Merge pull request #331 from react-native-webrtc/sdk_lower_30_compatible

Make foreground service compatible with SDK version < 30

Author: manuquentin

README.md

@@ -833,6 +833,7 @@ Since iOS 13, you'll have to report the incoming calls that wakes up your applic
 ## Android 11
 
 Since Android 11, your application [requires to start a foregroundService](https://developer.android.com/about/versions/11/privacy/foreground-services) in order to access the microphone in background.
+You'll need to upgrade your `compileSdkVersion` to `30` to be able to use this feature.
 
 You have to set the `foregroundService` key in the [`setup()`](#setup) method and add a `foregroundServiceType` in the [`AndroidManifest` file](docs/android-installation.md#android-common-step-installation).
 

android/src/main/java/io/wazo/callkeep/Constants.java

@@ -18,4 +18,6 @@ public class Constants {
     public static final String EXTRA_CALLER_NAME = "EXTRA_CALLER_NAME";
     // Can't use telecom.EXTRA_DISABLE_ADD_CALL ...
     public static final String EXTRA_DISABLE_ADD_CALL = "android.telecom.extra.DISABLE_ADD_CALL";
+
+    public static final int FOREGROUND_SERVICE_TYPE_MICROPHONE = 128;
 }

android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java

@@ -56,7 +56,6 @@
 import java.util.UUID;
 import java.util.stream.Collectors;
 
-import static android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE;
 import static io.wazo.callkeep.Constants.ACTION_AUDIO_SESSION;
 import static io.wazo.callkeep.Constants.ACTION_ONGOING_CALL;
 import static io.wazo.callkeep.Constants.ACTION_CHECK_REACHABILITY;
@@ -65,6 +64,7 @@
 import static io.wazo.callkeep.Constants.EXTRA_CALL_NUMBER;
 import static io.wazo.callkeep.Constants.EXTRA_CALL_UUID;
 import static io.wazo.callkeep.Constants.EXTRA_DISABLE_ADD_CALL;
+import static io.wazo.callkeep.Constants.FOREGROUND_SERVICE_TYPE_MICROPHONE;
 
 // @see https://github.com/kbagchiGWC/voice-quickstart-android/blob/9a2aff7fbe0d0a5ae9457b48e9ad408740dfb968/exampleConnectionService/src/main/java/com/twilio/voice/examples/connectionservice/VoiceConnectionService.java
 @TargetApi(Build.VERSION_CODES.M)