[Settings] Enable support for AdaptiveIcon (Data Usage, Hotspot, VPN)

This is a change to enable the support of AdaptiveIcon for following
widgets:
1. Data Usage
2. Wi-Fi Hotspot
3. VPN

Bug: 225252321
Test: local
Change-Id: I523dee9cfd435a95fd31e8730053e0d9ff2c2339
(cherry picked from commit 86027479cb48c6850e4209a5144d69f1b742df69)
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 9986e34..9df98b3 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -721,7 +721,7 @@
             android:name="Settings$WifiTetherSettingsActivity"
             android:label="@string/wifi_hotspot_checkbox_text"
             android:exported="true"
-            android:icon="@drawable/ic_wifi_tethering">
+            android:icon="@drawable/ic_homepage_wifi_tethering">
             <intent-filter>
                 <action android:name="com.android.settings.WIFI_TETHER_SETTINGS" />
                 <category android:name="android.intent.category.DEFAULT" />
@@ -766,7 +766,7 @@
             android:name="Settings$VpnSettingsActivity"
             android:label="@string/vpn_settings_title"
             android:exported="true"
-            android:icon="@drawable/ic_settings_wireless">
+            android:icon="@drawable/ic_homepage_vpn">
             <intent-filter android:priority="1">
                 <action android:name="android.settings.VPN_SETTINGS" />
                 <action android:name="android.net.vpn.SETTINGS" />
@@ -2910,7 +2910,7 @@
             android:name="Settings$DataUsageSummaryActivity"
             android:label="@string/data_usage_summary_title"
             android:exported="true"
-            android:icon="@drawable/ic_settings_data_usage">
+            android:icon="@drawable/ic_homepage_data_usage">
             <intent-filter android:priority="1">
                 <action android:name="android.settings.DATA_USAGE_SETTINGS" />
                 <category android:name="android.intent.category.DEFAULT" />