Revert "libmedia: Add ICS constructor for getOutput"

This reverts commit 469fa10160b4577d70972314d117060f9845421d.
Add missing functions and signatures for older OMX video libs compat

Nvidia OMX libs need these to work
That fixes hardware OMX video codecs + Camera on TF101

Change-Id: I57fccc15968c196771546ccd1d90e21e7bba33a0
AudioTrack: Do not inline getSessionId either

Should help for other nvomx versions that requires it.

Change-Id: Ie8e3b9449ebf0915ae3432ab2f12794bb8ef39c9
AudioTrack: fix getSessionId