Don't fc_sort on platform file contexts

Sorting algorithm of fc_sort is not perfect and often causes unexpected
behaviors. We are moving from fc_sort to manual ordering of platform
file_contexts files.

In addition, this sets remove_comment as true by default, as fc_sort has
been removing comments / empty lines.

Bug: 299839280
Test: TH
Change-Id: Ic8a02b64fc70481234467a470506580d2e6efd94
diff --git a/build/soong/selinux_contexts.go b/build/soong/selinux_contexts.go
index b053c7a..de7355c 100644
--- a/build/soong/selinux_contexts.go
+++ b/build/soong/selinux_contexts.go
@@ -289,8 +289,8 @@
 }
 
 func (m *selinuxContextsModule) buildFileContexts(ctx android.ModuleContext, inputs android.Paths) android.Path {
-	if m.properties.Fc_sort == nil {
-		m.properties.Fc_sort = proptools.BoolPtr(true)
+	if m.properties.Remove_comment == nil {
+		m.properties.Remove_comment = proptools.BoolPtr(true)
 	}
 	return m.buildGeneralContexts(ctx, inputs)
 }