change default animation scale to 0.25
Do not block home button if incoming call is a background call

The user want to navigate ahead if it is a call in background.
So we allow it.

Change-Id: If40b8abba05b600191bfc1403f197e624fd7a360
App Circle Sidebar: Support for Configurable Trigger Region [1/2]

Change-Id: Ib89a98e607f48108b1a1fb54f00335a3bc4ff2e7