feat(pwa) update TWA Android project

twa/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

+<!--
+    Copyright 2019 Google Inc. All Rights Reserved.
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt">
+    <background>
+        <layer-list>
+            <item android:drawable="@android:color/white" />
+            <!-- 
+                The paddings below give the icons a similar proportion as the
+                icon generated by WebAPKs.
+            -->
+            <item android:drawable="@mipmap/ic_maskable"
+                android:top="8.5dp"
+                android:right="8.5dp"
+                android:left="8.5dp"
+                android:bottom="8.5dp" />
+        </layer-list>
+    </background>
+    <foreground android:drawable="@android:color/transparent" />
+</adaptive-icon>

twa/app/src/main/res/raw/web_app_manifest.json

-{"android_package_name":"org.jitsi.meet","prefer_related_applications":true,"related_applications":[{"id":"org.jitsi.meet","platform":"chromeos_play"}],"short_name":"Jitsi Meet","name":"Jitsi Meet","icons":[{"src":"icons/icon192.png","type":"image/png","sizes":"192x192"},{"src":"icons/icon512.png","type":"image/png","sizes":"512x512"}],"start_url":"/","background_color":"#2a3a4b","display":"standalone","scope":"/","theme_color":"#2a3a4b"}
+{"android_package_name":"org.jitsi.meet","prefer_related_applications":true,"related_applications":[{"id":"org.jitsi.meet","platform":"chromeos_play"}],"short_name":"Jitsi Meet","name":"Jitsi Meet","icons":[{"src":"icons/icon192.png","type":"image/png","sizes":"192x192"},{"src":"icons/icon512.png","type":"image/png","sizes":"512x512"},{"src":"icons/iconMask.png","sizes":"512x512","type":"image/png","purpose":"maskable"}],"start_url":"/","background_color":"#17A0DB","display":"standalone","scope":"/","theme_color":"#17A0DB"}