Run ktmft on a subset of files under WindowManager/Shell/s/c/a/wm/shell/desktopmode

Command:
external/ktfmt/ktfmt.sh --kotlinlang-style
libs/WindowManager/Shell/src/com/android/wm/shell/desktopmode/
(we pick a handful of files to lower the chance of merge conflicts)

Bug: 372593306
Test: NA
Flag: EXEMPT formatting
Change-Id: I5ba2f8da874c8af9e0204f9703058bc09a5d50f7