BLE audio: support assigning volume at BLE device connection

Add support for associating an initial volume with a BLE
connection:
- add volume info to BluetoothProfileConnectionInfo in a new
BLE output factory method
- when handling device connection for BLE, also check if
volume information from the connection information is available.

Bug: 233975367
Test: atest frameworks/base/media/tests/MediaFrameworkTest/src/com/android/mediaframeworktest/unit/BluetoothProfileConnectionInfoTest.java
Change-Id: Ib54267727bc4d47e6999f2b84eab805f23c4955a

media/java/android/media/BluetoothProfileConnectionInfo.java

@@ -125,6 +125,21 @@ public final class BluetoothProfileConnectionInfo implements Parcelable {
             -1, isLeOutput);
     }
 
+    /**
+     * @hide
+     * Factory method for <code>BluetoothProfileConnectionInfo</code> for an LE output device
+     * @param suppressNoisyIntent if true the {@link AudioManager.ACTION_AUDIO_BECOMING_NOISY}
+     *     intent will not be sent.
+     * @param volume the volume index of the device, -1 if unknown or to be ignored
+     * @return an instance of BluetoothProfileConnectionInfo for the BLE output device that reflects
+     *     the given parameters
+     */
+    public static @NonNull BluetoothProfileConnectionInfo createLeAudioOutputInfo(
+            boolean suppressNoisyIntent, int volume) {
+        return new BluetoothProfileConnectionInfo(BluetoothProfile.LE_AUDIO, suppressNoisyIntent,
+                volume, /*isLeOutput*/ true);
+    }
+
     /**
      * @return The profile connection
      */