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

Ninja complains with:
expected depfile 'foo.d' to mention 'bar', got 'baz'

Running ninja twice now reports "no work to do" again.

This change required updating all calls to build_utils.WriteDepFile() so
that the output is passed in. While doing this, I also made the helper
add in GetPythonDependencies() by default.

build/android/gyp/ant.py I just deleted rather than updating since it's
GYP-only.

BUG=646165

Review-Url: https://codereview.chromium.org/2336173003
Cr-Commit-Position: refs/heads/master@{#418455}
diff --git a/build/protoc_java.py b/build/protoc_java.py
index 470667c..46fa820 100755
--- a/build/protoc_java.py
+++ b/build/protoc_java.py
@@ -57,9 +57,9 @@
       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)