javalib: Spawn child virtmgr and connect to it

Instead of connecting to the global virtualizationservice, make
VirtualMachine spawn a child virtmgr process and connect to it via
RpcBinder.

Bug: 245727626
Test: atest -p packages/modules/Virtualization:avf-presubmit
Change-Id: Ia79adbf7502c33a9a904363f1c75cfbfe8b6b4c7
diff --git a/apex/Android.bp b/apex/Android.bp
index d5f485b..dce8edd 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -57,6 +57,7 @@
         "com.android.virt-bootclasspath-fragment",
     ],
     jni_libs: [
+        "libvirtualizationservice_jni",
         "libvirtualmachine_jni",
     ],
 }