property_contexts: Drop COMPATIBLE_PROP guard

public/property_contexts needs to be included regardless of
API level so that the property *labels* are always included.
Else, devices without PRODUCT_COMPATIBLE_PROPERTY (shipping
API level <27) will run into denials because the props are
labeled `default_prop`.

As a side benefit, this reduces deviation in test matrices.

The guard was originally introduced in:
e49714542e "Whitelist exported platform properties"

Test: Build for device without PRODUCT_COMPATIBLE_PROPERTY,
no more denials for accessing `default_prop` from e.g. HALs.

Change-Id: I5bbe5d078040bb26dd48d353953661c9375d2009
Signed-off-by: Felix <google@ix5.org>

build/soong/selinux_contexts.go

@@ -149,10 +149,7 @@ func (m *selinuxContextsModule) GenerateAndroidBuildActions(ctx android.ModuleCo
 			inputs = append(inputs, segroup.SystemExtPrivateSrcs()...)
 		} else {
 			inputs = append(inputs, segroup.SystemPrivateSrcs()...)
-
-			if ctx.Config().ProductCompatibleProperty() {
-				inputs = append(inputs, segroup.SystemPublicSrcs()...)
-			}
+			inputs = append(inputs, segroup.SystemPublicSrcs()...)
 		}
 
 		if proptools.Bool(m.properties.Reqd_mask) {