BluetoothMidiService: Remove target version

Platform APIs should not explicitly define the API version.
In Android.bp, platform_apis is set to true so the correct API
version will be chosen automatically.

Bug: 215743611
Change-Id: Ie974cbb41a1c2cb2d59991970d3d632a831c4462
Test: Verified Echo and Identity tests with MIDIMatrix

media/packages/BluetoothMidiService/AndroidManifest.xml

@@ -20,8 +20,6 @@
         xmlns:tools="http://schemas.android.com/tools"
         package="com.android.bluetoothmidiservice"
         >
-    <uses-sdk android:minSdkVersion="33" android:targetSdkVersion="33" />
-
     <uses-feature android:name="android.hardware.bluetooth_le"
          android:required="true"/>
     <uses-feature android:name="android.software.midi"

media/packages/BluetoothMidiService/AndroidManifestBase.xml

@@ -19,7 +19,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.android.bluetoothmidiservice"
           >
-    <uses-sdk android:minSdkVersion="33" android:targetSdkVersion="33" />
     <application
         android:label="BluetoothMidi"
         android:defaultToDeviceProtectedStorage="true"