Fix status bar flicker on adding widgets requiring configuration.

- Changes ProxyActivityStarter theme to draw transparent navigation and status bar

Test: locally
Flag: N/A
Bug: 202485497

Change-Id: I88d14099ec9b1f433fbcdc9184fe5af557bc180b
diff --git a/quickstep/AndroidManifest.xml b/quickstep/AndroidManifest.xml
index 7c0a5ae..6d958ed 100644
--- a/quickstep/AndroidManifest.xml
+++ b/quickstep/AndroidManifest.xml
@@ -95,10 +95,11 @@
         </provider>
 
         <activity android:name="com.android.launcher3.proxy.ProxyActivityStarter"
-             android:theme="@android:style/Theme.Translucent.NoTitleBar.Fullscreen"
-             android:launchMode="singleTask"
-             android:clearTaskOnLaunch="true"
-             android:exported="false"/>
+            android:theme="@style/ProxyActivityStarterTheme"
+            android:launchMode="singleTask"
+            android:clearTaskOnLaunch="true"
+            android:exported="false"
+            />
 
         <activity android:name="com.android.quickstep.interaction.GestureSandboxActivity"
             android:autoRemoveFromRecents="true"
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 4cb6414..82a227a 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -409,6 +409,12 @@
         <item name="android:windowTranslucentStatus">true</item>
     </style>
 
+    <style name="ProxyActivityStarterTheme" parent="@android:style/Theme.Translucent.NoTitleBar">
+        <item name="android:navigationBarColor">@android:color/transparent</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
+        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+    </style>
+
     <style name="FolderStyleDefault">
         <item name="folderTopPadding">24dp</item>
         <item name="folderCellHeight">94dp</item>