a/android: Bump ktfmt to 0.53 and reformat it

Signed-off-by: utzcoz <[e-mail]>
Part-of: <https://gitlab.freedesktop.org/monado/monado/-/merge_requests/2382>

src/xrt/auxiliary/android/build.gradle

···
     kotlin {
         target 'src/main/java/**/*.kt'
         // Use ktfmt(https://github.com/facebook/ktfmt) as the default Kotlin formatter.
-        ktfmt('0.43').kotlinlangStyle()
+        ktfmt("$ktfmtVersion").kotlinlangStyle()
     }
 }

src/xrt/auxiliary/android/src/main/java/org/freedesktop/monado/auxiliary/SystemUiController.kt

···
 
     private abstract class Impl(var view: View) {
         private val uiHandler: Handler = Handler(Looper.getMainLooper())
+
         abstract fun hide()
+
         fun runOnUiThread(runnable: Runnable) {
             uiHandler.post(runnable)
         }