Add basic tests for ACameraMetadata_fromCameraMetadata.

For CaptureResult: validates that SENSOR_TIMESTAMP values are equal
between Java and C++.
For CameraCharacteristics: validates that LENS_FACING values are equal
between Java and C++.

Test: atest android.hardware.camera2.cts.CameraManagerTest#testCameraCharacteristicsNdkFromSdk android.hardware.camera2.cts.CaptureResultTest#testCameraCaptureResultAllKeys
Bug: 80513080

Change-Id: I20669099d9e2a8c903e331c6694256c9be5a3ec5