Cancel pending call redirection request if there's new one. am: bd950b26 am:...

Cancel pending call redirection request if there's new one. am: bd950b26 am: 7d43f35f am: 1981d513

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/14550638

Change-Id: I61eff1ce2b8f98a9d9856cb99dabdad76285a6b7