Add com.android.vending.BILLING permission (#2930)

Author: DaVinci9196

vending-app/src/main/AndroidManifest.xml

@@ -28,6 +28,12 @@
         tools:ignore="ProtectedPermissions" />
     <uses-permission android:name="com.google.android.gms.auth.permission.GOOGLE_ACCOUNT_CHANGE"/>
 
+    <permission
+        android:description="@string/billing_permission_desc"
+        android:label="@string/billing_permission_label"
+        android:name="com.android.vending.BILLING"
+        android:protectionLevel="instant|normal"/>
+
     <uses-permission
         android:name="android.permission.USE_CREDENTIALS"
         android:maxSdkVersion="22" />

vending-app/src/main/res/values-zh-rCN/strings.xml

@@ -44,4 +44,6 @@
     <string name="vending_overview_enterprise_row_mandatory_missing_hint">你的设备缺少由你的管理员选择的强制应用。</string>
     <string name="vending_overview_enterprise_no_apps_available">你的管理员尚未提供应用。</string>
     <string name="vending_overview_row_installed">已安装的应用</string>
+    <string name="billing_permission_desc">允许用户通过 Google Play 在此应用内购买商品。</string>
+    <string name="billing_permission_label">Google Play 结算服务</string>
 </resources>

vending-app/src/main/res/values-zh-rTW/strings.xml

@@ -44,4 +44,6 @@
     <string name="toast_not_installed">microG Companion 無法單獨使用，請安裝 microG Services 以使用 microG 。</string>
     <string name="download_notification_attachment_file">%s 的附加元件</string>
     <string name="download_notification_tips">下載中</string>
+    <string name="billing_permission_desc">允許使用者透過 Google Play 在此應用程式內購買商品。</string>
+    <string name="billing_permission_label">Google Play 結帳服務</string>
 </resources>

vending-app/src/main/res/values/strings.xml

@@ -56,5 +56,7 @@
     <string name="installer_notification_progress_splitinstall_commiting">Installing required components for %s</string>
     <string name="download_notification_attachment_file">Additional files for %s</string>
     <string name="download_notification_tips">Downloading</string>
+    <string name="billing_permission_desc">Allows the user to purchase items through Google Play from within this app.</string>
+    <string name="billing_permission_label">Google Play billing service</string>
 
 </resources>