Install libnotify-bin in test container

This is needed to test cros-notificationd

BUG=chromium:1190645
TEST=kokoro

Disallow-Recycled-Builds: test-failures
Change-Id: I16b10e01f311604f3733ea2756f73d76a4769f6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/containers/cros-container-guest-tools/+/2777751
Reviewed-by: David Munro <davidmunro@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Fergus Dall <sidereal@google.com>
diff --git a/lxd/lxd_test_setup.sh b/lxd/lxd_test_setup.sh
index 891d1fc..018b19e 100755
--- a/lxd/lxd_test_setup.sh
+++ b/lxd/lxd_test_setup.sh
@@ -76,6 +76,9 @@
       | debconf-set-selections
     apt-get -q -y install samba
 
+    # For crostini.Notify
+    apt-get -q -y install libnotify-bin
+
     # For graphics.GLBench
     if [ "${release}" = "buster" ]; then
         # presubmit isn't pulling debs built by mesa. Skip the installation for presubmit only.