Revert "compatibility-v7-mediarouter: change compat dependency to latest"

This reverts commit bba6154437ed1cfec739e3807274a59df87ad434.
Revert "play-apk-expansion/downloader-library: change compat dependency to latest"

This reverts commit 1694812757a726bd39f73e44d8a4b36e283b5eb5.