Fix NPE when locking private space in taskbar allapps.

We can just remove the check since isSearchSupported has been launched.

bug: 345648701
Test manually video -
before: https://drive.google.com/file/d/1EwwRXrASusmqVixGWuKGnOQQyiDLE6Yy/view?usp=sharing
after: https://drive.google.com/file/d/1OCvtxzbhRJrBMMM2JH_cOurQ-_BaALSA/view?usp=sharing
Flag: com.android.launcher3.enable_private_space
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e770f10d2a6a047c1ad7b1061f57c388dec4f913)
Merged-In: I0ae19d342556aac4ee0b6e26b4cef8752c0beb38
Change-Id: I0ae19d342556aac4ee0b6e26b4cef8752c0beb38