Add a method to mark current call as active

Author: manuquentin

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

@@ -182,6 +182,16 @@ public void setActive(Boolean active) {
         VoiceConnectionService.setActive(active);
     }
 
+    @ReactMethod
+    public void setCurrentCallActive() {
+        Connection conn = VoiceConnectionService.getConnection();
+        if (conn == null) {
+            return;
+        }
+
+        conn.setActive();
+    }
+
     @ReactMethod
     public void openPhoneAccounts() {
         if (!isAvailable()) {