Merge "Start listening to telephony changes in #start()" am: dd2dd2baa2 am: 5e1899796f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2222847

Change-Id: I0a60c00b0ee9e29a4e25dcf2fb4ff399f728084e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>