Fix android depfiles to always list GN's outputs[0]

build/protoc_java.py

Index: build/protoc_java.py
diff --git a/build/protoc_java.py b/build/protoc_java.py
index 470667c1f4bff9d7d1b130db2d5435bfda0d26d5..46fa8200ebd596cd2c26b4f1f2c8c2868597b361 100755
--- a/build/protoc_java.py
+++ b/build/protoc_java.py
@@ -57,9 +57,9 @@ def main(argv):
       build_utils.ZipDir(options.srcjar, temp_dir)
 
   if options.depfile:
-    build_utils.WriteDepfile(
-        options.depfile,
-        args + [options.protoc] + build_utils.GetPythonDependencies())
+    assert options.srcjar
+    deps = args + [options.protoc]
+    build_utils.WriteDepfile(options.depfile, options.srcjar, deps)
 
   if options.stamp:
     build_utils.Touch(options.stamp)