Merge "Wait for camera extensions service during initialization" into sc-qpr1-dev am: 2f68a663 am: ff2ce8ac am: 1817068b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15838336

Change-Id: I25cb74ccce85be590cad907493ba00255ed2ac1a