Android: Make javac more robust when renaming files.

Hit this in crbug.com/1011149: moving a file without changing its
contents doesn't cause it target to appear stale, so an incremental
build could pass even if there are issues (ex. didn't update package
to match the new file path).

Bug: 1011149
Change-Id: I280f27deaf2d5e4f8cebe464d7f3afb6965cdbbf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1841814Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Eric Stevenson <estevenson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702952}

build/android/gyp/javac.py

@@ -591,7 +591,7 @@ def main(argv):
       options.jar_path + '.info',
   ]
 
-  input_strings = javac_cmd + classpath
+  input_strings = javac_cmd + classpath + java_files
   if options.jar_info_exclude_globs:
     input_strings.append(options.jar_info_exclude_globs)
   build_utils.CallAndWriteDepfileIfStale(