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 remote-tracking branch 'medipad/jb-mr1-mod' into jb-mr1-mod
Merge remote-tracking branch 'medipad/jb-mr1-mod' into jb-mr1-bluez-mod