libmedia: Add ICS AudioStreamType constructor

Needed for Samsung legacy camera libs.

Change-Id: If03d8525b55181ea20dc934dbcbfef85402c42c7
libmedia: Add legacy compatible overloads for some methods

These overloads are needed by Samsung legacy camera libs.

Change-Id: I12590b1e86c2e0fa9958c5baa714110ff77a5eec
av: Clean up QCOM build flags

 * Remove dead flags
 * Enable standard flags by default

Change-Id: I15b4743a2569360dcb5798f2f1d8f4390a68899a