Translate ServiceSpecificException from aidl to CAS-specific
exceptions. Also, throw CAS specific exception for descramble().
bug: 22804304
Change-Id: I6d68c335c87fbb95fd8cc227e432eed4e5951550
Java API changes to support MediaCas framework.
Also add partial-frame related enums to MediaCodec,
MediaCodecInfo, and MediaExtractor as a way to indicate
a input frame contains partial data.
Test: basic test app and test plugin to execise the code path;
impelenting playback of CAS-secured MPEG2TS streams, including
a Widevine-based CAS plugin, locally modified ExoPlayer and
Android TV Tuner input.
bug: 22804304
Change-Id: Ia4ba1d4046f7588e42bfb21e726390457d2fc8e3
