Document checkPhoneAccountEnabled and checkPhoneAccountEnabled

Author: manuquentin

README.md

@@ -388,6 +388,29 @@ const options = {
 RNCallKeep.hasDefaultPhoneAccount(options);
 ```
 
+### checkPhoneAccountEnabled
+
+Checks if the user has set a default [phone account](https://developer.android.com/reference/android/telecom/PhoneAccount) and it's enabled.
+
+It's useful for custom permission prompts. It should be used in pair with `registerPhoneAccount`
+Similar to `hasDefaultPhoneAccount` but without trigering a prompt if the user doesn't have a phone account.
+
+_This feature is available only on Android._
+
+```js
+RNCallKeep.checkPhoneAccountEnabled();
+```
+
+### isConnectionServiceAvailable
+
+Check if the device support ConnectionService.
+
+_This feature is available only on Android._
+
+```js
+RNCallKeep.checkPhoneAccountEnabled();
+```
+
 ### backToForeground
 _This feature is available only on Android._