Add check to determine if runtime permissions are required (#477)

* Add check to PermissionManager to determine if runtime permissions are required for a certain Android OS version

* added missing import

Author: tobrun

mapbox/libandroid-telemetry/src/main/java/com/mapbox/services/android/telemetry/permissions/PermissionsManager.java

@@ -4,6 +4,7 @@
 import android.app.Activity;
 import android.content.Context;
 import android.content.pm.PackageManager;
+import android.os.Build;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
 
@@ -51,6 +52,10 @@ public static boolean areLocationPermissionsGranted(Context context) {
       || isFineLocationPermissionGranted(context);
   }
 
+  public static boolean areRuntimePermissionsRequired() {
+    return android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
+  }
+
   public void requestLocationPermissions(Activity activity) {
     // Request fine location permissions by default
     requestLocationPermissions(activity, true);