Grey out LE audio offload switcher as LE audio isn't enabled/supported

Screenshot: https://screenshot.googleplex.com/C6pRBzLh7CtNeXr

Bug: 233018305
Bug: 233005340
Test: make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothLeAudioHwOffloadPreferenceControllerTest
Change-Id: I0ea498d2fa191f9b9352b37500a5d2c348b36ce0
Merged-In: I0ea498d2fa191f9b9352b37500a5d2c348b36ce0
(cherry picked from commit f71b2ea56e)

src/com/android/settings/development/BluetoothLeAudioHwOffloadPreferenceController.java

@@ -18,6 +18,9 @@ package com.android.settings.development;
 
 import static com.android.settings.development.BluetoothA2dpHwOffloadPreferenceController.A2DP_OFFLOAD_SUPPORTED_PROPERTY;
 
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothManager;
+import android.bluetooth.BluetoothStatusCodes;
 import android.content.Context;
 import android.os.SystemProperties;
 
@@ -43,6 +46,9 @@ public class BluetoothLeAudioHwOffloadPreferenceController
     static final String LE_AUDIO_OFFLOAD_SUPPORTED_PROPERTY =
             "ro.bluetooth.leaudio_offload.supported";
 
+    @VisibleForTesting
+    BluetoothAdapter mBluetoothAdapter;
+
     @VisibleForTesting
     boolean mChanged = false;
 
@@ -50,6 +56,7 @@ public class BluetoothLeAudioHwOffloadPreferenceController
             DevelopmentSettingsDashboardFragment fragment) {
         super(context);
         mFragment = fragment;
+        mBluetoothAdapter = context.getSystemService(BluetoothManager.class).getAdapter();
     }
 
     @Override
@@ -66,10 +73,17 @@ public class BluetoothLeAudioHwOffloadPreferenceController
 
     @Override
     public void updateState(Preference preference) {
+        if (mBluetoothAdapter == null) {
+            return;
+        }
+
+        final boolean leAudioEnabled =
+                (mBluetoothAdapter.isLeAudioSupported() == BluetoothStatusCodes.FEATURE_SUPPORTED);
+
         final boolean offloadSupported =
                 SystemProperties.getBoolean(A2DP_OFFLOAD_SUPPORTED_PROPERTY, false)
                 && SystemProperties.getBoolean(LE_AUDIO_OFFLOAD_SUPPORTED_PROPERTY, false);
-        if (offloadSupported) {
+        if (leAudioEnabled && offloadSupported) {
             final boolean offloadDisabled =
                     SystemProperties.getBoolean(LE_AUDIO_OFFLOAD_DISABLED_PROPERTY, true);
             ((SwitchPreference) mPreference).setChecked(offloadDisabled);
@@ -82,12 +96,20 @@ public class BluetoothLeAudioHwOffloadPreferenceController
     @Override
     protected void onDeveloperOptionsSwitchDisabled() {
         super.onDeveloperOptionsSwitchDisabled();
+        if (mBluetoothAdapter == null) {
+            return;
+        }
+
+        final boolean leAudioEnabled =
+                (mBluetoothAdapter.isLeAudioSupported() == BluetoothStatusCodes.FEATURE_SUPPORTED);
         final boolean offloadSupported =
                 SystemProperties.getBoolean(A2DP_OFFLOAD_SUPPORTED_PROPERTY, false)
                 && SystemProperties.getBoolean(LE_AUDIO_OFFLOAD_SUPPORTED_PROPERTY, false);
-        if (offloadSupported) {
+        if (leAudioEnabled && offloadSupported) {
             ((SwitchPreference) mPreference).setChecked(true);
             SystemProperties.set(LE_AUDIO_OFFLOAD_DISABLED_PROPERTY, "true");
+        } else {
+            mPreference.setEnabled(false);
         }
     }