Merge "Remove the feature flag of contextual home V2" into rvc-dev am: 1471727cdb am: be044b011a am: bb65605a2f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11907890

Change-Id: Ie2cdc06b030dd582a7e962f57d90e781b8f1ba64