Fix drm aidl listeners

This is a part of change to fix cts test issue on drm framework by using clearkey aidl as the backend plugin.

Test: atest
CtsMediaDrmTestCases: android.media.drm.cts.NativeMediaDrmClearkeyTest#testClearKeyPlaybackCenc
Bug: 206804036
Change-Id: I2ad8a863dc1804e74d0fc40b933473546ed39b4a
10 files changed