Clarify keeping only the languages devs need

SUPERCILEX · web-flow · commit 4f8b6216a620 · 2018-03-26T15:06:59.000-07:00
diff --git a/auth/README.md b/auth/README.md
@@ -84,7 +84,7 @@ android {
 
     defaultConfig {
        // ...
-       resConfigs "auto"
+       resConfigs "en" // And any other languages you support
     }
 }
 ```

Original file line number	Diff line number	Diff line change
`@@ -84,7 +84,7 @@ android {`
`84`	`84`
`85`	`85`	`defaultConfig {`
`86`	`86`	`// ...`
`87`		`- resConfigs "auto"`
	`87`	`+ resConfigs "en" // And any other languages you support`
`88`	`88`	`}`
`89`	`89`	`}`
`90`	`90`	```