Replace isWeaverAvailable() with getWeaverService() am: 73d7a1bf41

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2781895

Change-Id: If054c78c82155db7bcfde36b841b0a50c0fac357
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>