Move support library to a separate static library

frameworks/base/core/tests/coretests uses the libcore/support/* classes
for SSL-based tests. Instead of including core-tests itself, we need to
split out the support classes to its own library to keep frameworks
tests below the dex method limit.

Change-Id: Ic11dbd1c6f897af10c6cfe47efb977018ef2ad9a

Conflicts:
	JavaLibrary.mk