Rename VirtualizationTestHelper to MicrodroidHostTestHelper

This is a common base class for Microdroid host tests. Make the name
reflect the purpose.

Test: m MicrodroidHostTestCases
Change-Id: I746d76205c9c26ce71f5e8c1025257bf6057f913
diff --git a/compos/tests/Android.bp b/compos/tests/Android.bp
index b77a7e4..72da97f 100644
--- a/compos/tests/Android.bp
+++ b/compos/tests/Android.bp
@@ -12,7 +12,7 @@
     ],
     data_native_bins: ["bcc_validator"],
     static_libs: [
-        "VirtualizationTestHelper",
+        "MicrodroidHostTestHelper",
     ],
     test_suites: [
         "general-tests",