Keep InCallUI in memory (2/3)

Here, we set the sharedUserId so the dummy InCallUI.apk can
share the process.

Change-Id: Idfb7fa760eacc8d6e46d50ce682fb06c0acfc8f4
Merge "Keep InCallUI in memory (2/3)" into cm-11.0
Merge branch 'upstream/cm-11.0'