Fix gradle generation with annotation processors

Change-Id: Ie9594e5ee6b01ff2f940119dcf77f0ba7503693b
Reviewed-on: https://chromium-review.googlesource.com/1239420Reviewed-by: agrieve <agrieve@chromium.org>
Commit-Queue: Aiden Benner <abenner@google.com>
Cr-Commit-Position: refs/heads/master@{#593705}

build/android/gradle/generate_gradle.py

@@ -242,7 +242,12 @@ class _ProjectEntry(object):
 
   def IsValid(self):
     return self.GetType() in (
-        'android_apk', 'java_library', 'java_binary', 'junit_binary')
+      'android_apk',
+      'java_library',
+      "java_annotation_processor",
+      'java_binary',
+      'junit_binary',
+    )
 
   def ResZips(self):
     return self.DepsInfo().get('owned_resources_zips', [])
@@ -576,8 +581,10 @@ def _GenerateGradleFile(entry, generator, build_vars, source_properties,
 
   if deps_info['type'] == 'android_apk':
     target_type = 'android_apk'
-  elif deps_info['type'] == 'java_library':
-    if deps_info['is_prebuilt'] or deps_info['gradle_treat_as_prebuilt']:
+  elif deps_info['type'] in ('java_library', 'java_annotation_processor'):
+    is_prebuilt = deps_info.get('is_prebuilt', False)
+    gradle_treat_as_prebuilt = deps_info.get('gradle_treat_as_prebuilt', False)
+    if is_prebuilt or gradle_treat_as_prebuilt:
       return None
     elif deps_info['requires_android']:
       target_type = 'android_library'