Improve install function to support gradle build types.

Instead of assuming apk location we use the vim findfile() function to find the
location. This asumes the name of the apk file follows the
<project>-<build>.apk format.
adding a comment
Updated adding 'assemble' script
Fixing AndroidBuild to work with 'test'
Merge branch 'develop' into AndroidScan-command
Refactoring for clearity. Untested!