package-manager: Unhide FEATURE_UWB

UWB now has a 3p facing API surface via androidx. Unhiding the feature
for 3p apps to use.

Bug: 257326947
Test: Compiles
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:51c5f7ba66cfc8c5d7fe3e45eaa2deda084f8e41)
Merged-In: I7071385c509585349bab169797e3d6e32ab425cd

Change-Id: I7071385c509585349bab169797e3d6e32ab425cd