Change API key in mock-GoogleService-Info.plist to match valid format (#1058)

Author: maksymmalyhin

mock-GoogleService-Info.plist

@@ -7,7 +7,7 @@
 	<key>AD_UNIT_ID_FOR_INTERSTITIAL_TEST</key>
 	<string>ca-app-pub-3940256099942544/4411468910</string>
 	<key>API_KEY</key>
-	<string>AIzaSyAzlj4APqi5S58nFtE52Da-fYBOHA2MhaY</string>
+	<string>AIzaSyAzlj4APqi5S58nFtE52Da0fYBOHA2MhaY</string>
 	<key>BUNDLE_ID</key>
 	<string>id</string>
 	<key>CLIENT_ID</key>