Fix split divider position issue

ag/13463021 missed a case to convert for leashing.
Also, fixed logic typo in setSideStageVisibility

Bug: 168505645
Test: adb shell dumpsys activity service SystemUIService WMShell setSideStageVisibility false
Change-Id: Iaba1f25d457d0211d43364bb6885ba688fea3790
2 files changed