Merge "Update TARE README." into tm-dev am: 6b0afd11 am: ce084c8d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17593173



Change-Id: I9f6c3f5cf3f2731871223c0123692f7b6a416be9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>