o Removed setMode() methods and related mode constants
o Removed some of the unused the metadata keys
o Updated the javadoc
o part of a multi-project change.
bug - 2433195
Change-Id: I5ed167f1fd6a53cb143b7dc385b149431d434438
MediaMetadataRetriever uses a single static lock for all operations.
This effectively serializes all metadata retrieval operations in a
single process. This patch uses the object level lock for all normal
operations and only uses the static lock to serialize calls to
release.
Change-Id: I81c9f234c2f0007a26d18e1398c709b41a4dbbd7
