Reparent IME window and handle non-fullscreen windows correctly

IME window is attached to the IME target if possible. This ensures
a smooth enter/exit animation when the activity is coming in/going
away.

Furthermore, if the controlling window doesn't span the entire
display, we can't offer controlling it in a frame-by-frame
manner, and we need to do the inset calculations relative to the
display frame.

Test:
adb shell setprop persist.wm.new_insets 1
adb shell setprop persist.pre_render_ime_views 0

Test: Open IME, go home, reopen app
Test: Show dialog with EditText
Bug: 111084606
Change-Id: Id40470f6f8284b48acfa4719049afd14fde332d6

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/utils/testutils/java/android/view/test/InsetsModeSession.java b/tests/utils/testutils/java/android/view/test/InsetsModeSession.java
new file mode 100644
index 000000000000..c83dfa41d260
--- /dev/null
+++ b/tests/utils/testutils/java/android/view/test/InsetsModeSession.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view.test;
+
+import android.view.ViewRootImpl;
+
+/**
+ * Session to set insets mode for {@link ViewRootImpl#sNewInsetsMode}.
+ */
+public class InsetsModeSession implements AutoCloseable {
+
+    private int mOldMode;
+
+    public InsetsModeSession(int flag) {
+        mOldMode = ViewRootImpl.sNewInsetsMode;
+        ViewRootImpl.sNewInsetsMode = flag;
+    }
+
+    @Override
+    public void close() throws Exception {
+        ViewRootImpl.sNewInsetsMode = mOldMode;
+    }
+}