[automerger skipped] Added IMS graceful tear down support am: fa1677a9 am:...

[automerger skipped] Added IMS graceful tear down support am: fa1677a9 am: abc89c9e am: 247b2519 -s ours am: 08f7802a -s ours

am skip reason: Merged-In Ie794c236b0a69ebc8f12e30d62560f79d9b21698 with SHA-1 158bd39b is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/2007472

Change-Id: Ifd689e3596b1abe1dcf392908ef3719c0b3f2dce