Merge "Migrate stagefright to Soong" am: e11545cf74 am: fcb60f6147 am: 1dcfba4769 am: c8e6a233e8 am: d7937b554f

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1865634

Change-Id: Ifd3fb4d5ae5662e7c2ce221be443edd53d664277