Add support for generating jars from protos and add cacheinvalidation_java.

build/all_android.gyp

Index: build/all_android.gyp
diff --git a/build/all_android.gyp b/build/all_android.gyp
index 75c4a37cdad28a998c9f35d3be2ed5686f9292c3..2d58e503b02356a9ce9fd2306b2c06659c18aba6 100644
--- a/build/all_android.gyp
+++ b/build/all_android.gyp
@@ -22,6 +22,10 @@
         'android_builder_tests',
         '../android_webview/android_webview.gyp:android_webview_apk',
         '../chrome/chrome.gyp:chromium_testshell',
+        # TODO(nyquist) This should instead by a target for sync when all of
+        # the sync-related code for Android has been upstreamed.
+        # See http://crbug.com/159203
+        '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation_javalib',
       ],
     }, # target_name: All
     {