Merge "Supported UNKNOWN in IWLAN handover rule" into tm-d1-dev am: 2c6ac09b am: d59d93d0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19509981



Change-Id: I4e75b0074ba69b2c882ecd05ff734237d4512c0e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>