Dialer: Make Edit number before call option work

Did not show phone number on dialpad,
auto hide DialpadFragment if the phone is not in use.

Do not hide DialpadFragment when reenter Dialer,
set the number get from intent to dialpad text.

CRs-Fixed: 740101

Change-Id: I3d7266f9b495b1025eac40f0cfb25750cbefc1c5