OverlayManager: Add categories

Adds the possibility to declare different categories
for resource overlays (e.g. themes, display cutout emulation, ...)

Bug: 72436677
Test: adb shell cmd overlay enable-exclusive --category com.android.internal.display_cutout_emulation android com.android.internal.display.cutout.emulation.narrow
Test: adb shell cmd overlay enable-exclusive --category com.android.internal.display_cutout_emulation android
Change-Id: I23f22113351b3948beb9e3a1fb969700852539cc