Add vendor available for libext2_blkid library

This is to support the cuttlefish f2fs/ext4
userdata filesystem.

Bug: 142424832
Test: local build
Change-Id: I7acb772e77d9250805e5a8a7e68f136deda7c5cb

lib/blkid/Android.bp

@@ -16,6 +16,7 @@ cc_library {
     name: "libext2_blkid",
     host_supported: true,
     ramdisk_available: true,
+    vendor_available: true,
     vendor_ramdisk_available: true,
     recovery_available: true,
     unique_host_soname: true,