Revert "Make Activites touch opaque - DO NOT MERGE" This reverts commit 74ce78dfb4179cb317d6e2fc3cabe5f60af5d02d. Reason for revert: re-release due to functional regression Change-Id: I71e2e889d1f2d026f708bdb617b73a5c7c10467d (cherry picked from commit dd4ee68792b9f8683637f57af10544a22c8f5c27) Merged-In: I71e2e889d1f2d026f708bdb617b73a5c7c10467d