Merge "Expand Javadoc for DISALLOW_WIFI_TETHERING" into tm-dev am: 73b3dc4f am: cae672b2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17563878



Change-Id: I3c62e923b7500fed2c63c3d0ed5b8e397d2a4e77
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>