Merge branch 'master' into version-2.0.0-dev

Change-Id: Ib65f67b63052ee3a0cf542a38931610208abbd9f

Author: samtstern

auth/README.md

@@ -184,14 +184,15 @@ startActivityForResult(
     RC_SIGN_IN);
 ```
 
-If a terms of service URL and a custom theme are required:
+If a terms of service URL, privacy policy URL, and a custom theme are required:
 
 ```java
 startActivityForResult(
     AuthUI.getInstance()
         .createSignInIntentBuilder()
         .setAvailableProviders(...)
         .setTosUrl("https://superapp.example.com/terms-of-service.html")
+        .setPrivacyPolicyUrl("https://superapp.example.com/privacy-policy.html")
         .setTheme(R.style.SuperAppTheme)
         .build(),
     RC_SIGN_IN);