Halo: Add master switch to disable Halo (2/2)

Change-Id: I78942ea1a31b7158172614b9f7baf2255b15db25

Conflicts:

	res/values/cm_strings.xml
HALO: Option to pause the underlying app (2/2)
- adds an option to pause the active app when using HALO
- this is enabled by default for devices with low memory
- (currently: <640MB RAM available to the kernel)

Change-Id: I3289bdcd0574ffe2c1cca63cc98fbfc10404b42e

Conflicts:

	res/values/cm_strings.xml
Add .75x animation scale