Add new API for unattended reboot.

CTS-Coverage-Bug: 179310594
Bug: 160784387
Test: manual
Change-Id: I59b7ff7afec9846a114ee8d20f14d22cf69f0680
Merged-In: I59b7ff7afec9846a114ee8d20f14d22cf69f0680
(cherry picked from commit 726fa0a5f400f95558dcb31effbb98fee67b54ed)

3 files changed, 92 insertions, 2 deletions

diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 9861973bcae8..04e8f6345dee 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -4157,6 +4157,21 @@ public class CarrierConfigManager {
     public static final String KEY_ALLOWED_INITIAL_ATTACH_APN_TYPES_STRING_ARRAY =
             "allowed_initial_attach_apn_types_string_array";
 
+    /**
+     * Boolean indicating whether the SIM PIN can be stored and verified
+     * seamlessly after an unattended reboot.
+     *
+     * The device configuration value {@code config_allow_pin_storage_for_unattended_reboot}
+     * ultimately controls whether this carrier configuration option is used.  Where
+     * {@code config_allow_pin_storage_for_unattended_reboot} is false, the value of the
+     * {@link #KEY_STORE_SIM_PIN_FOR_UNATTENDED_REBOOT_BOOL} carrier configuration option is
+     * ignored.
+     *
+     * @hide
+     */
+    public static final String KEY_STORE_SIM_PIN_FOR_UNATTENDED_REBOOT_BOOL =
+            "store_sim_pin_for_unattended_reboot_bool";
+
     /** The default value for every variable. */
     private final static PersistableBundle sDefaults;
 
@@ -4710,6 +4725,7 @@ public class CarrierConfigManager {
         sDefaults.putInt(KEY_DEFAULT_RTT_MODE_INT, 0);
         sDefaults.putStringArray(KEY_ALLOWED_INITIAL_ATTACH_APN_TYPES_STRING_ARRAY,
                 new String[]{"ia", "default", "ims", "mms", "dun", "emergency"});
+        sDefaults.putBoolean(KEY_STORE_SIM_PIN_FOR_UNATTENDED_REBOOT_BOOL, true);
     }
 
     /**
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index e8ace34793db..30c28f8317bf 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -121,12 +121,10 @@ import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
-import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.Executor;
 import java.util.function.Consumer;
@@ -14824,4 +14822,66 @@ public class TelephonyManager {
             Log.e(TAG, "Error calling ITelephony#clearSignalStrengthUpdateRequest", e);
         }
     }
+
+    /**
+     * The unattended reboot was prepared successfully.
+     * @hide
+     */
+    @SystemApi
+    public static final int PREPARE_UNATTENDED_REBOOT_SUCCESS = 0;
+
+    /**
+     * The unattended reboot was prepared, but the user will need to manually
+     * enter the PIN code of at least one SIM card present in the device.
+     * @hide
+     */
+    @SystemApi
+    public static final int PREPARE_UNATTENDED_REBOOT_PIN_REQUIRED = 1;
+
+    /**
+     * The unattended reboot was not prepared due to generic error.
+     * @hide
+     */
+    @SystemApi
+    public static final int PREPARE_UNATTENDED_REBOOT_ERROR = 2;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = {"PREPARE_UNATTENDED_REBOOT_"},
+            value = {
+                    PREPARE_UNATTENDED_REBOOT_SUCCESS,
+                    PREPARE_UNATTENDED_REBOOT_PIN_REQUIRED,
+                    PREPARE_UNATTENDED_REBOOT_ERROR
+            })
+    public @interface PrepareUnattendedRebootResult {}
+
+    /**
+     * Prepare TelephonyManager for an unattended reboot. The reboot is required to be done
+     * shortly (e.g. within 15 seconds) after the API is invoked.
+     *
+     * <p>Requires Permission:
+     *   {@link android.Manifest.permission#REBOOT}
+     *
+     * @return {@link #PREPARE_UNATTENDED_REBOOT_SUCCESS} in case of success.
+     * {@link #PREPARE_UNATTENDED_REBOOT_PIN_REQUIRED} if the device contains
+     * at least one SIM card for which the user needs to manually enter the PIN
+     * code after the reboot. {@link #PREPARE_UNATTENDED_REBOOT_ERROR} in case
+     * of error.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.REBOOT)
+    @PrepareUnattendedRebootResult
+    public int prepareForUnattendedReboot() {
+        try {
+            ITelephony service = getITelephony();
+            if (service != null) {
+                return service.prepareForUnattendedReboot();
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "Telephony#prepareForUnattendedReboot RemoteException", e);
+            e.rethrowFromSystemServer();
+        }
+        return PREPARE_UNATTENDED_REBOOT_ERROR;
+    }
 }
diff --git a/telephony/java/com/android/internal/telephony/ITelephony.aidl b/telephony/java/com/android/internal/telephony/ITelephony.aidl
index 77d46f4c39cd..e270b8dc3fe4 100644
--- a/telephony/java/com/android/internal/telephony/ITelephony.aidl
+++ b/telephony/java/com/android/internal/telephony/ITelephony.aidl
@@ -2414,4 +2414,18 @@ interface ITelephony {
      */
     void clearSignalStrengthUpdateRequest(int subId, in SignalStrengthUpdateRequest request,
             String callingPackage);
+
+    /**
+     * Prepare TelephonyManager for an unattended reboot. The reboot is
+     * required to be done shortly after the API is invoked.
+     *
+     * Requires system privileges.
+     *
+     * @return {@link #PREPARE_UNATTENDED_REBOOT_SUCCESS} in case of success.
+     * {@link #PREPARE_UNATTENDED_REBOOT_PIN_REQUIRED} if the device contains
+     * at least one SIM card for which the user needs to manually enter the PIN
+     * code after the reboot. {@link #PREPARE_UNATTENDED_REBOOT_ERROR} in case
+     * of error.
+     */
+    int prepareForUnattendedReboot();
 }