Revert "Fix makefile include hierarchy"

This reverts commit eb72f666b752dc07c7a9e41c9c487b4c3ec18029.

Reason for revert: breaks qt-qpr targets

Bug: 7456955
Change-Id: I35fb130839eb81aeb899515dbaa212f42a7f6d52
diff --git a/media/codec2/Android.mk b/media/codec2/Android.mk
index 17f28ff..82d739f 100644
--- a/media/codec2/Android.mk
+++ b/media/codec2/Android.mk
@@ -45,4 +45,4 @@
 .PHONY: docs-all
 docs-all: docs-api docs-internal
 
-include $(call first-makefiles-under,$(call my-dir))
+include $(call all-makefiles-under,$(call my-dir))