style: add disabled state to switches

Add a disabled state to the M3 switches.

CHANGELOG.md

@@ -10,6 +10,7 @@
 
 #### Dev/Meta
 - Enabled elevation drop shadows below Android P for consistency
+- Switches now have a disabled state
 - Reworked dynamic color usage
 - Reworked logging
 

app/src/main/res/color/sel_m3_switch_thumb.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="?attr/colorOnSurface" android:alpha="0.12" android:state_enabled="false" />
     <item android:color="?attr/colorOnPrimary" android:state_checked="true" />
     <item android:color="?attr/colorSurfaceVariant" />
 </selector>

app/src/main/res/color/sel_m3_switch_track.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="?attr/colorOnSurface" android:alpha="0.38" android:state_enabled="false" />
     <item android:color="?attr/colorPrimary" android:state_checked="true" />
     <item android:color="?attr/colorOnSurfaceVariant" />
 </selector>