Merge "Create two variants of libstagefright_mpeg2support library" am: 4607206af8 am: 28275b41cf am: fd904533d2 am: 398f3cfe12

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1353483

Change-Id: Ibb891f3555d75573f2e20eb85bb5122ae08c6f3c