Add display compat system feature to PackageManager

Bug: 300642384
Test: atest-src CtsAppTestCases:android.app.cts.SystemFeaturesTest#testFeatureNamespaces
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:71d171a13beb9adfa7c9f6a5a7beccca9c9a7580)
Merged-In: I1c01965764e308491e0f064f0d3e1129c66101bb
Change-Id: I1c01965764e308491e0f064f0d3e1129c66101bb
1 file changed