Add __INTRODUCED_IN to audio/camera/media headers.

Bug: https://github.com/android-ndk/ndk/issues/706
Test: builds
Change-Id: I519d4fd825d40c3f72515f29a7e5b12c23a1749a
Exempt-From-Owner-Approval: cherrypick
(cherry picked from commit 85a41536a4885b12120ddafb4d0b3fee8a8613b6)
18 files changed