Add package name to export file name when exporting one application

Fixes #1465
Update README.md

SRT AppGuard added ("Similar solutions").
Update README.md

Short description for SRT AppGuard added.
Update README.md

Android 4.3+ Permission Manager converted to italics.
Update README.md

Added "System apps cannot be restricted."
Merge pull request #1484 from Phylon/patch-2

Update README.md
Updated similar solutions section
Merge remote-tracking branch 'upstream/master'
Suppress java.io.FileNotFoundException/permission denied (support info)
Android ID lower case input
1.99.61 beta
Update strings.xml
Merge pull request #1487 from wongsyrone/patch-2

Update zh_CN strings.xml
Updated changelog
Batch toggle on demand requires dangerous
Updated Android support library to latest version
Batch enable/disable on demand restricting will disable/enable update notifications too
Clearer toggle restrictions title
Show correct title for enable/disable on demand
Show usage data for selected category only