Add framework-media to sdk

This was removed in Iff38291b964de4116bcdefe4fd74136c4878c543 in favor
of using the bootclasspath fragment. However the bootclasspath fragment
for media does not contain the API tracking files, so it back for now
to make sure we can finalize the media API files.

This CL may be revertable in the future if we can get the
java_sdk_library into the bootclasspath_fragment somehow.

Bug: 190807367
Bug: 188427719
Test: m media-module-sdk and inspect the zip for api tracking files
Change-Id: Ia01c32d4c6c6bad734df053da0024a139a808a54