Fix incorrect fragment animation used for hiding fragments
Mirror of support lib patch
https://android-review.googlesource.com/#/c/60032/ into
frameworks/base.

AOSP Commit: https://android-review.googlesource.com/#/c/60167/
HALO: Option to pause the underlying app (1/2)

- 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)
Merge pull request #24 from tonyp/jellybean

HALO: Option to pause the underlying app (1/2)
Merge remote-tracking branch 'pa/jellybean' into jellybean-legacy