Pass context into the constructor of SystemUI objects.

The next step is to remove `components` from the SystemUI objects
and replace them with Dagger injection.

Bug: 138786270
Test: atest SystemUITests
Change-Id: I27415a8fa8ba0378599356426d849c9cfb9879d2
diff --git a/packages/SystemUI/src/com/android/systemui/volume/VolumeUI.java b/packages/SystemUI/src/com/android/systemui/volume/VolumeUI.java
index f8cf793..d4a88b0 100644
--- a/packages/SystemUI/src/com/android/systemui/volume/VolumeUI.java
+++ b/packages/SystemUI/src/com/android/systemui/volume/VolumeUI.java
@@ -16,6 +16,7 @@
 
 package com.android.systemui.volume;
 
+import android.content.Context;
 import android.content.res.Configuration;
 import android.os.Handler;
 import android.util.Log;
@@ -37,6 +38,10 @@
     private boolean mEnabled;
     private VolumeDialogComponent mVolumeComponent;
 
+    public VolumeUI(Context context) {
+        super(context);
+    }
+
     @Override
     public void start() {
         boolean enableVolumeUi = mContext.getResources().getBoolean(R.bool.enable_volume_ui);