[3/3] Flip to Mute/Reject Call

Actual Logic for this functionality.

PS2: Remove unwanted space

Change-Id: Ia10df0045e9919c6b7efc97857abaeba246c365d
Making InCallUI to be persistent.

As result of low memory pressure, it has been observed that
the application manager may be receiving create request
during the time it was killing InCallUI.

The request is dropped but the Phone service side is
still waiting for binding, which causes any subsequent
MO/MT call to be put in the queue and never be presented
to the user; however the phone will be ringing leading
to a very disruptive user experience.

making the InCallUI persistent remove the problem;
it shall be noted that a cleaner solution may likely
be to update the application manager to be able to
automatically recover when such race condition between
call and low memory killer happens

b/12422658

Change-Id: Ifce541b654a497fa55a8f1576e6c6037454038f8
Signed-off-by: Pierre Couillaud <pierre@broadcom.com>