InCallUI: Disable Back button on Non-intursive InCall Card

Fix for jira issue http://jira.omnirom.org/browse/OMNI-296

PS2 to PS5: code cleanup

PS6: Remove Jira issue url from code

Change-Id: I257daccbb175265e2430f1b0b30c9175cb4b1981
InCallUI: Fix build error

Not including any resource means that the framework-res dependency
is not noted in the build system and sometimes (depending on the
timing) leads to build errors such as

http://jenkins.cyanogenmod.org/job/submission-test/7843/consoleText

Avoid the error by linking against a historical SDK and thus not
depending on framework-res.

Change-Id: I99b2ded018e0b0858bc1c3e31d236fc51d3eec2e