add config flag for runtime color filter api

Flag: com.android.graphics.hwui.flags.runtime_color_filters_blenders

Test: none
Bug: 358126864
Change-Id: I2d519cbf0c4db5ac9bc433c9bfc1105a3450702a
diff --git a/libs/hwui/aconfig/hwui_flags.aconfig b/libs/hwui/aconfig/hwui_flags.aconfig
index 13c0b00..05e62a8 100644
--- a/libs/hwui/aconfig/hwui_flags.aconfig
+++ b/libs/hwui/aconfig/hwui_flags.aconfig
@@ -2,6 +2,13 @@
 container: "system"
 
 flag {
+  name: "runtime_color_filters_blenders"
+  namespace: "core_graphics"
+  description: "API for AGSL authored runtime color filters and blenders"
+  bug: "358126864"
+}
+
+flag {
   name: "clip_shader"
   is_exported: true
   namespace: "core_graphics"