Merge changes I373db2f4,I3f0cc1dd,I05f8ed86,Iec0cc3d2,I01cfcaf1, ...

* changes:
  codec2: signal aliases in XML vs. C2Store
  codec2: Codec2InfoBuilder rework
  stagefright: list only the first codec for a given name
  stagefright: find codecs by their aliases as well
  stagefright: MediaCodecsXmlParser: add support for parsing rank
  stagefright: add method to MediaCodecInfoWriter to find existing info
  stagefright: rework and simplify OmxInfoBuilder
  codec2: CCodec plugin CreateInputSurface should create C2 HAL surface
  codec2: C2PlatformStore: signal component traits via interface
  codec2: make C2Component::Traits.aliases a vector of C2Strings