vndk-def: Add libstagefright_omx and libmedia_omx

Bug: 64503245
Test: Reduce two warnings on a device

Change-Id: Ifbb0ab6568f732eb5ee095b1db30d57666759a31
Merged-In: Ifa6cabdcf865112f6e4fdbbc57020b6283d159bc
(cherry picked from commit 3311419933f54ae1e09372cf23f47bbed09a9445)
1 file changed