Fix unit tests in AOSP Contacts

Fixes: 142947789
Change-Id: I7b36f8066819d59db6a2291160b1713284c14d12
Test: atest ContactsTests
diff --git a/tests/README b/tests/README
index 3829344..43d905c 100644
--- a/tests/README
+++ b/tests/README
@@ -2,6 +2,8 @@
 
 Build and install Contacts.apk
 
+Grant Contacts permissions to Contacts.apk
+
 Run
 ```shell
 $ atest ContactsTests