AIDEGen: Remove the duplicate *.srcjar from srcs

AIDEGen collects the complied sources which are generated from build
system, the sources includes not only java/kt files but also srcjar
files. Since the srcjar files are record in srcjars parameter in json
file, we should keep only java or kt files in the srcs parameter.

The size diff of module_bp_java_deps.json:
Without this patch: 15,298,369 Bytes
With this patch: 15,044,804 Bytes

The build time diff:
Without this patch: 2m31.345
With this patch: 2m32.662

Bug: 141528361
Test: 1. m clean -j
      2. aidegen tradefed
      3. Open out/soong/module_bp_java_deps.json
      4. Find the module CtsSyncManagerCommon and check the
         sync_manager_cts.srcjar files doesn't exist in srcs but exists
         in srcjars section.

Change-Id: I43fc5c05b657473054e632cae4795220907dc711