Removing explicit target SDK for launcher

> It will automatically target the latest SDK it was compiled with

Bug: 284349887
Test: Presubmit and manual
Flag: N/A
Change-Id: I32629b0dd710c3c04d8f70f988b7279e7cae6731
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 709c57c..46fe73e 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -24,6 +24,7 @@
 
 import android.annotation.TargetApi;
 import android.app.ActivityManager;
+import android.app.ActivityOptions;
 import android.app.Person;
 import android.app.WallpaperManager;
 import android.content.Context;
@@ -561,6 +562,17 @@
     }
 
     /**
+     * Utility method to allow background activity launch for the provided activity options
+     */
+    public static ActivityOptions allowBGLaunch(ActivityOptions options) {
+        if (ATLEAST_U) {
+            options.setPendingIntentBackgroundActivityStartMode(
+                    ActivityOptions.MODE_BACKGROUND_ACTIVITY_START_ALLOWED);
+        }
+        return options;
+    }
+
+    /**
      * Returns the full drawable for info without any flattening or pre-processing.
      *
      * @param shouldThemeIcon If true, will theme icons when applicable