Put only src in FRAMEWORKS_SUPPORT_JAVA_SRC_DIRS for multidex

This keeps only the real sources in doc target and fixes some error
messages caused by trying to generate docs of the tests.

(cherry picked from commit 100aba5374376f679602387db59fccd609b8abe3)

Change-Id: I39f3ede95ae68777ca5e3db4ab5c6ebeefc86ac6
1 file changed