Android: Rework input device hotplug

Previously, when an input device was connected or disconnected, we would
recreate all devices. This commit makes it so we only touch the relevant
device instead. This matters because recreating a device causes us to
drop all held buttons for that device. Due to Android only delivering
inputs as events, we're unable to poll for currently held buttons when
recreating a device.

This recently became a problem for users of Ayn devices due to a
firmware update. Every now and then, something about the display
viewports changes, triggering an update to an input device that I assume
is a touch input device. This input device isn't something users
normally map in Dolphin's controller settings, but it changing was
causing Dolphin to drop all held buttons for the device's built-in
gamepad as well as any other connected gamepads.

1 files changed, 3 insertions, 11 deletions

diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/model/ControllerInterface.kt b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/model/ControllerInterface.kt
index 360800d656..71b37ff513 100644
--- a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/model/ControllerInterface.kt
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/input/model/ControllerInterface.kt
@@ -95,11 +95,6 @@ object ControllerInterface {
         deviceQualifier: String, axisNames: Array<String>, suspended: Boolean
     )
 
-    /**
-     * Rescans for input devices.
-     */
-    external fun refreshDevices()
-
     external fun getAllDeviceStrings(): Array<String>
 
     external fun getDevice(deviceString: String): CoreDevice?
@@ -193,13 +188,10 @@ object ControllerInterface {
     }
 
     private class InputDeviceListener : InputManager.InputDeviceListener {
-        // Simple implementation for now. We could do something fancier if we wanted to.
-        override fun onInputDeviceAdded(deviceId: Int) = refreshDevices()
+        override external fun onInputDeviceAdded(deviceId: Int)
 
-        // Simple implementation for now. We could do something fancier if we wanted to.
-        override fun onInputDeviceRemoved(deviceId: Int) = refreshDevices()
+        override external fun onInputDeviceRemoved(deviceId: Int)
 
-        // Simple implementation for now. We could do something fancier if we wanted to.
-        override fun onInputDeviceChanged(deviceId: Int) = refreshDevices()
+        override external fun onInputDeviceChanged(deviceId: Int)
     }
 }