Update Android.mk denylist to only block the following directories in kernel/.

kernel/configs/
kernel/prebuilts/
kernel/tests/

Bug: 319658303
Test: CIs
Change-Id: I2f70ac856ec6fcf0a969aeae25eb55a730057e05
diff --git a/ui/build/androidmk_denylist.go b/ui/build/androidmk_denylist.go
index b2266b2..e004cdc 100644
--- a/ui/build/androidmk_denylist.go
+++ b/ui/build/androidmk_denylist.go
@@ -25,7 +25,10 @@
 	"cts/",
 	"dalvik/",
 	"developers/",
-	"kernel/",
+	// Do not block other directories in kernel/, see b/319658303.
+	"kernel/configs/",
+	"kernel/prebuilts/",
+	"kernel/tests/",
 	"libcore/",
 	"libnativehelper/",
 	"pdk/",