gn2bp: Add get_outputs to the BaseActionSanitizer

Test: ./update_results.sh
Change-Id: I242b68800bdcabe7cf955046e12ef9c112c0d321
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index 26f5726..49217f0 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -728,6 +728,9 @@
   def get_args(self):
     return self.target.args
 
+  def get_outputs(self):
+    return self.target.outputs
+
 class WriteBuildDateHeaderSanitizer(BaseActionSanitizer):
   def get_args(self):
     self._set_arg_at(0, '$(out)')
@@ -841,6 +844,7 @@
 
   sanitizer = get_action_sanitizer(target)
   target.args = sanitizer.get_args()
+  target.outputs = sanitizer.get_outputs()
 
   if target.script == '//base/android/jni_generator/jni_generator.py':
     # fix target.output directory to match #include statements.