Include MicrodroidTestPreparer where it's used

This isn't required for local test with atest,
but required for running tests in the cloud with sandboxed environment.

Bug: 277655002, Bug: 272496125
Test: TH
Change-Id: I45551e276a99750340c84ad3c0e5eb7dc2394899
diff --git a/compos/benchmark/Android.bp b/compos/benchmark/Android.bp
index 12b3ae8..dc0c01c 100644
--- a/compos/benchmark/Android.bp
+++ b/compos/benchmark/Android.bp
@@ -18,4 +18,6 @@
     sdk_version: "test_current",
     use_embedded_native_libs: true,
     compile_multilib: "64",
+
+    host_required: ["MicrodroidTestPreparer"],
 }