Revert "Remove Q matrices"

Revert submission 2808255-deprecate_android_q

Reason for revert: Broke a device build that is targeting Q b/308482858

Reverted changes: /q/submissionid:2808255-deprecate_android_q

Change-Id: Icc5250b219b8500bbd98eba0d20c637c76b734e6
diff --git a/compatibility_matrices/Android.mk b/compatibility_matrices/Android.mk
index d145f9e..d356cf3 100644
--- a/compatibility_matrices/Android.mk
+++ b/compatibility_matrices/Android.mk
@@ -101,6 +101,7 @@
 endif # DEVICE_PRODUCT_COMPATIBILITY_MATRIX_FILE
 
 my_system_matrix_deps := \
+    framework_compatibility_matrix.4.xml \
     framework_compatibility_matrix.5.xml \
     framework_compatibility_matrix.6.xml \
     framework_compatibility_matrix.7.xml \