Add ABI check to IMapper5

Bug: 254345788
Test: Make change, verify build fails
Change-Id: Ib97b26f1483293b0461c47184ae39c48b9404b0f
diff --git a/graphics/mapper/stable-c/imapper.map.txt b/graphics/mapper/stable-c/imapper.map.txt
new file mode 100644
index 0000000..43abd33
--- /dev/null
+++ b/graphics/mapper/stable-c/imapper.map.txt
@@ -0,0 +1,4 @@
+LIBIMAPPER { # introduced=UpsideDownCake
+  global:
+    AIMapper_loadIMapper;
+}