Generates the care_map.txt in protobuf format

Call the host binary care_map_generator to generate the care_map in
protobuf format. The parsing part of proto messages has already been
supported in the update_verifier.

Bug: 77867897
Test: unittests pass; run add_image_to_target_files
Change-Id: I40d3184b4b5c48a6dd55203afc84cca73d5765e9
diff --git a/core/Makefile b/core/Makefile
index 6a70bd2..1bd5127 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2934,6 +2934,7 @@
   $(HOST_OUT_EXECUTABLES)/brillo_update_payload \
   $(HOST_OUT_EXECUTABLES)/lib/shflags/shflags \
   $(HOST_OUT_EXECUTABLES)/delta_generator \
+  $(HOST_OUT_EXECUTABLES)/care_map_generator \
   $(AVBTOOL) \
   $(BLK_ALLOC_TO_BASE_FS) \
   $(BROTLI) \