Merge pull request #9954 from ian-liu/dialer/Bug854786_fix_touching_exsit_call_number_for_accepting_second_incominig_call

Bug 854786 - [Dialer]Accepting Incoming call when already in call is not hiding the accept/reject/ignore call option, r=@etiennesegonzac(cherry picked from commit 7878532edf5fe7b44d1889be6b736313b08cd47a)