Revert "Make Activites touch opaque - DO NOT MERGE" This reverts commit 22261fa6649f6ec6441646743ad98132fcf47fe0. Reason for revert: Re-release due to functional regression Change-Id: I9ca1fa2f140d640159fabec1424c52867cf01a60 (cherry picked from commit on googleplex-android-review.googlesource.com host: 23bf0bda7d9b97a82ea04257318bb90677561476) Merged-In: I9ca1fa2f140d640159fabec1424c52867cf01a60