Install 'android_binary' of example to source root

Add target_alias to the tests that require it.

ci.sh is passing.
Add skeleton pants_test.targets.test_android_binary

Just a skeleton now.This is to be expanded as behavior is added
to android_binary or android_target.
Add 'resources' and 'page' to BUILD file holding android example

Adding 'page' as in the other definitions, adding 'resources'
as John told me it will soon need.