add API flag for Matrix44

Test: none
Bug: 280116960

Change-Id: I76e1ce2c4fcd81ba08bb29c98a4319a6d5e4d4ac
diff --git a/libs/hwui/aconfig/hwui_flags.aconfig b/libs/hwui/aconfig/hwui_flags.aconfig
index 78a6479..64b2a93 100644
--- a/libs/hwui/aconfig/hwui_flags.aconfig
+++ b/libs/hwui/aconfig/hwui_flags.aconfig
@@ -1,6 +1,13 @@
 package: "com.android.graphics.hwui.flags"
 
 flag {
+  name: "matrix_44"
+  namespace: "core_graphics"
+  description: "API for 4x4 matrix and related canvas functions"
+  bug: "280116960"
+}
+
+flag {
   name: "limited_hdr"
   namespace: "core_graphics"
   description: "API to enable apps to restrict the amount of HDR headroom that is used"