playback: disable audio focus setting on api 31

Disable the ability to customize audio focus on Android 12 and up.

Android 12 automatically regulates audio streams even further than it
did in previous versions, to the point where the audio focus setting
no longer makes sense on that version. I may extend the removal to all
versions in the future.

CHANGELOG.md

@@ -9,6 +9,9 @@
 #### What's Fixed
 - Fixed issue where playback would start unexpectedly when opening the app
 
+#### What's Changed
+- Disabled audio focus customization on Android 12 [#75]
+
 ## v2.2.0
 #### What's New:
 - Added Arabic translations [Courtesy of hasanpasha]

app/src/main/java/org/oxycblt/auxio/playback/PlaybackFragment.kt

@@ -127,7 +127,6 @@ class PlaybackFragment : Fragment() {
             }
 
             binding.playbackLoop.setImageResource(resId)
-            binding.playbackLoop.isActivated = loopMode != LoopMode.NONE
         }
 
         playbackModel.position.observe(viewLifecycleOwner) { pos ->

app/src/main/java/org/oxycblt/auxio/playback/system/AudioReactor.kt

@@ -20,6 +20,7 @@ package org.oxycblt.auxio.playback.system
 
 import android.content.Context
 import android.media.AudioManager
+import android.os.Build
 import androidx.core.math.MathUtils
 import androidx.media.AudioAttributesCompat
 import androidx.media.AudioFocusRequestCompat
@@ -233,7 +234,7 @@ class AudioReactor(
     // --- INTERNAL AUDIO FOCUS ---
 
     override fun onAudioFocusChange(focusChange: Int) {
-        if (!settingsManager.doAudioFocus) {
+        if (!settingsManager.doAudioFocus && Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
             // Don't do audio focus if its not enabled
             return
         }

app/src/main/res/values-v31/config.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <bool name="enable_theme_settings">false</bool>
+    <bool name="enable_audio_focus_setting">false</bool>
 </resources>

app/src/main/res/values/config.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <bool name="enable_theme_settings">true</bool>
+    <bool name="enable_audio_focus_setting">true</bool>
     <integer name="recycler_spans">1</integer>
 </resources>

app/src/main/res/xml/prefs_main.xml

@@ -82,6 +82,7 @@
             app:defaultValue="true"
             app:iconSpaceReserved="false"
             app:key="KEY_AUDIO_FOCUS"
+            app:isPreferenceVisible="@bool/enable_audio_focus_setting"
             app:summary="@string/set_focus_desc"
             app:title="@string/set_focus" />