Remove references to BOARD_PLAT_{PUBLIC,PRIVATE}_SEPOLICY_DIR

These variables are deprecated.

Bug: 183362912
Test: Presubmit; Noop
Change-Id: I80db5342044a06feb1451fbe661989fe4d191e74
diff --git a/build/soong/build_files.go b/build/soong/build_files.go
index 88c07fa..5de6122 100644
--- a/build/soong/build_files.go
+++ b/build/soong/build_files.go
@@ -44,7 +44,7 @@
 	// system/sepolicy/{public, private, vendor, reqd_mask}
 	// and directories specified by following config variables:
 	// BOARD_SEPOLICY_DIRS, BOARD_ODM_SEPOLICY_DIRS
-	// BOARD_PLAT_PUBLIC_SEPOLICY_DIR, BOARD_PLAT_PRIVATE_SEPOLICY_DIR
+	// SYSTEM_EXT_PUBLIC_SEPOLICY_DIR, SYSTEM_EXT_PRIVATE_SEPOLICY_DIR
 	Srcs []string
 }
 
diff --git a/build/soong/filegroup.go b/build/soong/filegroup.go
index 700f8e0..0d426af 100644
--- a/build/soong/filegroup.go
+++ b/build/soong/filegroup.go
@@ -36,7 +36,7 @@
 	// system/sepolicy/{public, private, vendor, reqd_mask}
 	// and directories specified by following config variables:
 	// BOARD_SEPOLICY_DIRS, BOARD_ODM_SEPOLICY_DIRS
-	// BOARD_PLAT_PUBLIC_SEPOLICY_DIR, BOARD_PLAT_PRIVATE_SEPOLICY_DIR
+	// SYSTEM_EXT_PUBLIC_SEPOLICY_DIR, SYSTEM_EXT_PRIVATE_SEPOLICY_DIR
 	Srcs []string
 }
 
@@ -80,12 +80,12 @@
 	return fg.systemReqdMaskSrcs
 }
 
-// Source files from BOARD_PLAT_PUBLIC_SEPOLICY_DIR
+// Source files from SYSTEM_EXT_PUBLIC_SEPOLICY_DIR
 func (fg *fileGroup) SystemExtPublicSrcs() android.Paths {
 	return fg.systemExtPublicSrcs
 }
 
-// Source files from BOARD_PLAT_PRIVATE_SEPOLICY_DIR
+// Source files from SYSTEM_EXT_PRIVATE_SEPOLICY_DIR
 func (fg *fileGroup) SystemExtPrivateSrcs() android.Paths {
 	return fg.systemExtPrivateSrcs
 }