Element Call: Add audio output selector handled by Android (#4663)

- Add onUrlLoaded callback to WebViewWidgetMessageInterceptor
- Add WebViewAudioManager component and use it instead of the AudioManager extension functions
- Enable controlling the audio devices in Element Call from the OS instead of automatically detecting them
- Simplify the window flags in ElementCallActivity
- Work around the issue where the default audio device wasn't using the right audio stream
- Add onAudioPlaybackStarted, use it to start the audio-device related logic

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/compat/AudioManager.kt

@@ -1,70 +0,0 @@
-/*
- * Copyright 2025 New Vector Ltd.
- *
- * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
- * Please see LICENSE files in the repository root for full details.
- */
-
-package io.element.android.libraries.androidutils.compat
-
-import android.media.AudioDeviceInfo
-import android.media.AudioManager
-import android.os.Build
-import io.element.android.libraries.core.data.tryOrNull
-import timber.log.Timber
-
-fun AudioManager.enableExternalAudioDevice() {
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
-        // The list of device types that are considered as communication devices, sorted by likelihood of it being used for communication.
-        val wantedDeviceTypes = listOf(
-            // Paired bluetooth device with microphone
-            AudioDeviceInfo.TYPE_BLUETOOTH_SCO,
-            // USB devices which can play or record audio
-            AudioDeviceInfo.TYPE_USB_HEADSET,
-            AudioDeviceInfo.TYPE_USB_DEVICE,
-            AudioDeviceInfo.TYPE_USB_ACCESSORY,
-            // Wired audio devices
-            AudioDeviceInfo.TYPE_WIRED_HEADSET,
-            AudioDeviceInfo.TYPE_WIRED_HEADPHONES,
-            // The built-in speaker of the device
-            AudioDeviceInfo.TYPE_BUILTIN_SPEAKER,
-            // The built-in earpiece of the device
-            AudioDeviceInfo.TYPE_BUILTIN_EARPIECE,
-        )
-        val devices = availableCommunicationDevices
-        val selectedDevice = devices.minByOrNull {
-            wantedDeviceTypes.indexOf(it.type).let { index ->
-                // If the device type is not in the wantedDeviceTypes list, we give it a low priority
-                if (index == -1) Int.MAX_VALUE else index
-            }
-        }
-        selectedDevice?.let { device ->
-            Timber.d("Audio device selected, type: ${device.type}")
-            tryOrNull(
-                onException = { failure ->
-                    Timber.e(failure, "Audio: exception when setting communication device")
-                }
-            ) {
-                setCommunicationDevice(device).also {
-                    if (!it) {
-                        Timber.w("Audio: unable to set the communication device")
-                    }
-                }
-            }
-        }
-    } else {
-        // If we don't have access to the new APIs, use the deprecated ones
-        @Suppress("DEPRECATION")
-        isSpeakerphoneOn = true
-    }
-}
-
-fun AudioManager.disableExternalAudioDevice() {
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
-        clearCommunicationDevice()
-    } else {
-        // If we don't have access to the new APIs, use the deprecated ones
-        @Suppress("DEPRECATION")
-        isSpeakerphoneOn = false
-    }
-}