Better device controls

## Summary

This contains some minor code quality improvements in
`RunCommandControlsProviderService`, as well as the following feature changes:

* If the device for a Device Control is reachable, clicking on the secondary
  space of the control will launch RunCommandActivity. If the device isn't
  reachable, we launch the MainActivity like usual.
* Pixel 7 and other modern Google devices can now show KDE Connect commands
  in the 'Home' quick access tile (you still have to 'add app')

## Test Plan

0. Make sure your Android OS supports Device Controls (Android 11+)
1. Choose a paired device to work with
2. Place at least one command in the Run Command list
3. Enable the command in the Device Controls screen
4. Test what happens when you click on the secondary space of the control

res/layout/activity_run_command.xml

@@ -43,7 +43,7 @@ SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted
             app:layout_anchorGravity="bottom|end" />
 
         <TextView
-            android:id="@+id/add_comand_explanation"
+            android:id="@+id/add_command_explanation"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_gravity="center"

res/layout/toolbar.xml

@@ -8,14 +8,14 @@ SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted
 
 <com.google.android.material.appbar.AppBarLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_height="wrap_content"
     android:layout_width="match_parent"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:fitsSystemWindows="true">
 
     <com.google.android.material.appbar.MaterialToolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="?attr/actionBarSize"
-        app:title="@string/kde_connect"/>
+        tools:title="@string/kde_connect"/>
 </com.google.android.material.appbar.AppBarLayout>

res/layout/widget_remotecommandplugin.xml

@@ -16,13 +16,14 @@ SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted
     tools:ignore="RtlSymmetry">
 
     <LinearLayout
-        android:id="@+id/runcommandWidgetTitleHeader"
+        android:id="@+id/widget_title_wrapper"
         android:background="@color/on_secondary"
         android:gravity="center_vertical|start"
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
 
         <ImageView
+            android:id="@+id/widget_title_icon"
             android:padding="8dip"
             android:paddingEnd="6dip"
             android:layout_width="wrap_content"
@@ -33,7 +34,7 @@ SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted
             tools:ignore="UseAppTint"/> <!-- can't use app:tint in RemoteView -->
 
         <TextView
-            android:id="@+id/runcommandWidgetTitle"
+            android:id="@+id/widget_title_text"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:ellipsize="marquee"
@@ -45,7 +46,7 @@ SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted
     </LinearLayout>
 
     <ListView
-        android:id="@+id/run_commands_list"
+        android:id="@+id/widget_command_list"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:addStatesFromChildren="true"
@@ -53,7 +54,7 @@ SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted
         android:orientation="vertical" />
 
     <TextView
-        android:id="@+id/not_reachable_message"
+        android:id="@+id/widget_error_text"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:drawablePadding="8dip"