InCallUI: Dismiss reject sms dialogs when press back key on DSDA mode

On DSDA mode, when the user press back key, it does not dismiss reject sms
dialogs, mCannedResponsePopup and mCustomMessagePopup are not set to null.
Then hasPendingDialogs() will return false, so the user can not finish
InCallUI with back key when the incoming call is hung up.

Dismiss reject sms dialogs and set the dialog to null once the dialog is
cancelled by the user.

CRs-Fixed: 654387

Change-Id: Ic45a0906b38383a9a919df82b00e4f2010fac1cb
InCallUI: Call internalResolveIntent() in onCreat() method

Only call internalResolveIntent() method in onNewIntent() method,
if the user exit InCallUI with back key, and re-enter it via dialer,
the dialpad will not be displayed.

Call internalResolveIntent() in onCreat() method.

CRs-Fixed: 654611

Conflicts:
	src/com/android/incallui/InCallActivity.java

Change-Id: I23ef123c556aeb191bd041b478becd149ac408ec