Merge "Make gradle build use debuggable FeatureFlagManager" into sc-v2-dev am: d2984e95cf am: 6ef026a249

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16150895

Change-Id: Ideb147db421fcea6519fefb546dfbbe3b2eac420