Add dummy vndk library libmkbootimg to enable abi checks on boot_img_hdr.

Bug: 74763691

Test: m -j libmkbootimg creates libmkbootimg.so.lsdump.

Test: make -j64

Change-Id: I8d716c560467aaf090f4f7ee9cfbc53a9405f05d
(cherry picked from commit 4cc755dce527434dc4b79c1734185faeab084bac)
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index f5bcc26..944b00b 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -22,7 +22,8 @@
 
 LOCAL_C_INCLUDES := \
   $(LOCAL_PATH)/../adb \
-  $(LOCAL_PATH)/../mkbootimg \
+
+LOCAL_HEADER_LIBRARIES := bootimg_headers
 
 LOCAL_SRC_FILES := \
     bootimg_utils.cpp \