Merge "Remove the feature flag of contextual home V2" into rvc-dev am: 1471727cdb am: be044b011a am: bb65605a2f am: 980fa106e5

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

Change-Id: Ie993b5a659a0298adc1a5caf2d1a3d6628d38024