Merge "Fix NPE in DialerCall that cause it crash and failed to show disconnection error message." am: 5d01ebb84a am: e2eb24bd29 am: a31d71bd34 am: 0f8e79642c

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Dialer/+/1671906

Change-Id: I5c062bfee6cdd9b1680f1b8f1988fb5a9c37fea3