InCallUI: fix non-intrusive for RTL

http://jira.omnirom.org/browse/OMNI-522

Change-Id: Ib712ccc2c207e329bdfa4cf64d29f2aeb130f59b
InCallUI: unify flip action handler

We cannot share the code since DeskClock is only using
the app API but we can at least share the file :)

PS2
NPE derp

Change-Id: I1c5bfc36c18d00f91dcb5d2dcfe646543efdb205