Revert^2 "Provide explicitly versioned NNAPI AIDL utils libs -- HAL."

Reason for revert: rollforward fix of this topic

This change is a revert of I3d3ac4745, which itself is a revert of
I74f1798e8.

This CL modifies the AIDL utils libraries to be explicitly
versioned. Currently, we only have two versions: v1 and "current".
Specifically, the following changes are made:
- Remove AIDL dependencies from neuralnetworks_utils_hal_common
- Create explicitly versioned libs of neuralnetworks_utils_hal_aidl*

This is needed because it is not allowed for a build target to
link against multiple versions of the same AIDL lirary.

The canonical driver will report ANDROID_S for AIDL v1, and FL6 for v2.

Reverted Changes:
I2aefa0023:Revert "Use explicitly versioned NNAPI HAL util li...
Ia7df07ab9:Revert "Add neuralnetworks_utils_hal_aidl_v2 to al...
Iadd823460:Revert "Provide explicitly version NNAPI AIDL util...
I3d3ac4745:Revert "Provide explicitly versioned NNAPI AIDL ut...

Bug: 202405342
Test: NNT_static
Test: CtsNNAPITestCases
Test: VtsHalNeuralnetworksTargetTest
Change-Id: Ib3b732aa406f6d37e8f941082807c9232720c909
Merged-In: Ib3b732aa406f6d37e8f941082807c9232720c909
(cherry picked from commit 478a78ea77fccf332b04d5ad25309428d0f96eaf)

1 files changed, 28 insertions, 1 deletions

diff --git a/neuralnetworks/aidl/utils/src/Service.cpp b/neuralnetworks/aidl/utils/src/Service.cpp
index ac182a205e..01772eed53 100644
--- a/neuralnetworks/aidl/utils/src/Service.cpp
+++ b/neuralnetworks/aidl/utils/src/Service.cpp
@@ -17,6 +17,7 @@
 #include "Service.h"
 
 #include <AndroidVersionUtil.h>
+#include <aidl/android/hardware/neuralnetworks/IDevice.h>
 #include <android/binder_auto_utils.h>
 #include <android/binder_manager.h>
 #include <android/binder_process.h>
@@ -28,8 +29,33 @@
 #include <string>
 
 #include "Device.h"
+#include "Utils.h"
 
 namespace aidl::android::hardware::neuralnetworks::utils {
+namespace {
+
+// Map the AIDL version of an IDevice to NNAPI canonical feature level.
+nn::GeneralResult<nn::Version> getAidlServiceFeatureLevel(IDevice* service) {
+    CHECK(service != nullptr);
+    int aidlVersion;
+    const auto ret = service->getInterfaceVersion(&aidlVersion);
+    HANDLE_ASTATUS(ret) << "getInterfaceVersion failed";
+
+    // For service AIDL versions greater than or equal to the AIDL library version that the runtime
+    // was built against, clamp it to the runtime AIDL library version.
+    aidlVersion = std::min(aidlVersion, IDevice::version);
+
+    // Map stable AIDL versions to canonical versions.
+    switch (aidlVersion) {
+        case 1:
+            return nn::Version::ANDROID_S;
+        case 2:
+            return nn::Version::FEATURE_LEVEL_6;
+    }
+    return NN_ERROR() << "Unknown AIDL service version: " << aidlVersion;
+}
+
+}  // namespace
 
 nn::GeneralResult<nn::SharedDevice> getDevice(const std::string& instanceName) {
     auto fullName = std::string(IDevice::descriptor) + "/" + instanceName;
@@ -55,7 +81,8 @@ nn::GeneralResult<nn::SharedDevice> getDevice(const std::string& instanceName) {
                    << " returned nullptr";
         }
         ABinderProcess_startThreadPool();
-        return Device::create(instanceName, std::move(service));
+        const auto featureLevel = NN_TRY(getAidlServiceFeatureLevel(service.get()));
+        return Device::create(instanceName, std::move(service), featureLevel);
     };
 
     return hal::utils::ResilientDevice::create(std::move(makeDevice));