Reset letterboxVerticalPositionMultiplier with adb

Fix `adb shell wm reset-letterbox-style` so it resets
`letterBoxVerticalPositionMultiplier` too.

Test: Manual
Fix: 300873576
Change-Id: I1529aac06f71f97eeb6d90b95dbaa4c127745fd2

services/core/java/com/android/server/wm/WindowManagerShellCommand.java

diff --git a/services/core/java/com/android/server/wm/WindowManagerShellCommand.java b/services/core/java/com/android/server/wm/WindowManagerShellCommand.java
index bfe0553..74a0bafd3 100644
--- a/services/core/java/com/android/server/wm/WindowManagerShellCommand.java
+++ b/services/core/java/com/android/server/wm/WindowManagerShellCommand.java
@@ -1279,6 +1279,7 @@
             mLetterboxConfiguration.resetLetterboxBackgroundWallpaperBlurRadiusPx();
             mLetterboxConfiguration.resetLetterboxBackgroundWallpaperDarkScrimAlpha();
             mLetterboxConfiguration.resetLetterboxHorizontalPositionMultiplier();
+            mLetterboxConfiguration.resetLetterboxVerticalPositionMultiplier();
             mLetterboxConfiguration.resetIsHorizontalReachabilityEnabled();
             mLetterboxConfiguration.resetIsVerticalReachabilityEnabled();
             mLetterboxConfiguration.resetEnabledAutomaticReachabilityInBookMode();