Template for subsurface android package

For modifications to the final source code of built android package
such as permission additions and inclusion of xml and java files, it
is necessary to maintain a template. The template is copied without
any modifications on top of qt android-template before building
subsurface libraries. Refer:
http://qt-project.org/doc/qt-5/deployment-android.html#qmake-variables

Files that are required to be directly copied to android package
would be included in directory android.
Icons for subsurface on android and string.xml are included.

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>