Various addition to sl4a for PTS automation.

Add a few media related methods for MediaPlayer and MediaSession.
Add DisplayFacade to support DisplayManager and Display classes.
Whereas we are adding them for PTS, these additions are generic and not tied to PTS.

Merge master commit 579e6e488e034183b87cd63d6741f6ddc61b2dd3
Change-Id: I683cd2983cae8c45d8c88220d3a55429a056a2c8
5 files changed