Add guest binder services to device-side tests

Now MicrodroidTests will try to connect to the test service, and check
system property values for various tests. Redundant lines in
MicrodroidTestCase are also removed.

Bug: 203483081
Test: atest MicrodroidTests MicrodroidHostTestCases
Change-Id: Ia9345e0c6da857c9c4950e74b70dc2818d105f2c
diff --git a/tests/testapk/Android.bp b/tests/testapk/Android.bp
index 32c47dd..541e93f 100644
--- a/tests/testapk/Android.bp
+++ b/tests/testapk/Android.bp
@@ -9,6 +9,7 @@
     static_libs: [
         "androidx.test.runner",
         "androidx.test.ext.junit",
+        "com.android.microdroid.testservice-java",
     ],
     libs: ["android.system.virtualmachine"],
     jni_libs: ["MicrodroidTestNativeLib"],