Only restore previous currentPage in applyLoadPlan if mCurrentPage is outdated am: f0b8ef9dfd am: eb47ebddb1

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15736956

Change-Id: I025e97a118b613798db6edb8490365a4d55822b3