Add integer sanitization to libexif.

This turns integer sanitization on in libexif. A blacklist file is added
to prevent sanitization of a function which was seen to overflow during
testing but this seems to be intentional.

Bug: 67013630
Bug: 62343822
Test: Took pictures and videos.
Test: Mounted as PTP and MTP, browsed and downloaded files.
Change-Id: I7c2d2acead75797fba06488ef2e87a5c0fc2b66e
diff --git a/Android.bp b/Android.bp
index f648a4b..62ba943 100644
--- a/Android.bp
+++ b/Android.bp
@@ -64,6 +64,10 @@
         "-Werror",
     ],
 
+    sanitize: {
+        integer_overflow: true,
+        blacklist: "libexif_blacklist.txt",
+    },
 }
 
 // WARNING: this makefile builds a shared library. Do not ever make it build