Revert "Clean up build.gradle files in support library."

This reverts commit 5aa5b5567bd9855a8264acdf2e6e678ba9c9e3dc.

Seems to have broken the build:
https://android-build.googleplex.com/builds/submitted/3587954/sdk_mac/latest/logs

Change-Id: Iea84149ced89bec990c0d059fc47cabd9e36c148
1 file changed