Populate EXTRA_DISPLAY_TEXT for outgoing calls with a subject.

- Ensure call intent extras are passed into dialInternal, allowing the
RIL to know the subject.
- Set the EXTRA_DISPLAY_TEXT on the imsCallProfile to the
EXTRA_CALL_SUBJECT from Telecom.

Bug: 22685114
Change-Id: If5a2c2d505a1120cdb0a6560906fa8c20e5edeb9
Signed-off-by: Tyler Gunn <tgunn@google.com>