[LSC] Add LOCAL_LICENSE_KINDS to frameworks/av

Added SPDX-license-identifier-Apache-2.0 to:
  cmds/stagefright/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all
Change-Id: I6f8df3745d975b948a388c8066360a9e8c2426d1
1 file changed