Add LoWPAN permissions to shell manifest

Without this change, `lowpanctl`, the command line tool for managing
LoWPAN networks, won't be able to work properly.

Cherry-picked from commit 1b730e4bd2c8e03d2a9bf041a4acd6fd6c0467f1.

Bug: b/65490659
Test: Manually
Change-Id: Ie44bac5c3bdc956dc2b1e79284ad18eae6931a32
diff --git a/packages/Shell/AndroidManifest.xml b/packages/Shell/AndroidManifest.xml
index bd1ebb9..bfb51ae 100644
--- a/packages/Shell/AndroidManifest.xml
+++ b/packages/Shell/AndroidManifest.xml
@@ -95,6 +95,9 @@
     <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL" />
     <uses-permission android:name="android.permission.CREATE_USERS" />
     <uses-permission android:name="android.permission.MANAGE_DEVICE_ADMINS" />
+    <uses-permission android:name="android.permission.ACCESS_LOWPAN_STATE"/>
+    <uses-permission android:name="android.permission.CHANGE_LOWPAN_STATE"/>
+    <uses-permission android:name="android.permission.READ_LOWPAN_CREDENTIAL"/>
     <uses-permission android:name="android.permission.BLUETOOTH_STACK" />
     <uses-permission android:name="android.permission.GET_ACCOUNTS" />
     <uses-permission android:name="android.permission.RETRIEVE_WINDOW_TOKEN" />