Refactor AImage/AImageReader

1/ Use BufferItemConsumer instead of CpuConsumer for AImageReader.
2/ Delay lock image in AImage until the first time getPlaneXXX functions
get called.
3/ Add libmedia_jni as dependency so that we can reuse existing code
from android_media_Utils.h

Bug: 35114769
Test: Ran the following CTS test case from CtsCameraTestCases:
      NativeCameraDeviceTest, NativeCameraManagerTest,
      NativeImageReaderTest, NativeStillCaptureTest

Change-Id: Ia8dc451ea873e8290592deacc7f8d40360382f86