Rename compatibility_matrix.current.xml

We can stick with the expected number and drop the use of "current".

Test: m
Bug: 266392619
Change-Id: I309f3e2a031ae364d59b4f86a711ca637a30e6e1
diff --git a/compatibility_matrices/Android.mk b/compatibility_matrices/Android.mk
index d19f0da..a20f985 100644
--- a/compatibility_matrices/Android.mk
+++ b/compatibility_matrices/Android.mk
@@ -103,7 +103,7 @@
     framework_compatibility_matrix.5.xml \
     framework_compatibility_matrix.6.xml \
     framework_compatibility_matrix.7.xml \
-    framework_compatibility_matrix.current.xml \
+    framework_compatibility_matrix.8.xml \
     framework_compatibility_matrix.device.xml \
 
 my_framework_matrix_deps += \