Forward fix for: Set FLAG_IMMUTABLE flag on FirstScreenBroadcast PendingIntent. am: 89299047d7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14936503

Change-Id: I8c2e58a032fea1b556a32079aed32efe11ab2139
diff --git a/src/com/android/launcher3/model/FirstScreenBroadcast.java b/src/com/android/launcher3/model/FirstScreenBroadcast.java
index b8dbd08..4d017bd 100644
--- a/src/com/android/launcher3/model/FirstScreenBroadcast.java
+++ b/src/com/android/launcher3/model/FirstScreenBroadcast.java
@@ -17,12 +17,6 @@
 
 import static android.app.PendingIntent.FLAG_IMMUTABLE;
 import static android.app.PendingIntent.FLAG_ONE_SHOT;
-import static android.os.Process.myUserHandle;
-
-import static com.android.launcher3.pm.InstallSessionHelper.getUserHandle;
-
-import static java.util.stream.Collectors.groupingBy;
-import static java.util.stream.Collectors.mapping;
 
 import android.app.PendingIntent;
 import android.content.Context;