idsig: Include the APK digest

Get the best APK digest from the APK and include it in the generated
idsig.

Test: atest libidsig.test
Bug: 234564414
Change-Id: If55eab3bb62131bcdb9dfeb6000b9a5ba7ab9236
diff --git a/libs/apkverify/Android.bp b/libs/apkverify/Android.bp
index 2445dd5..d45a77f 100644
--- a/libs/apkverify/Android.bp
+++ b/libs/apkverify/Android.bp
@@ -24,6 +24,7 @@
     defaults: ["libapkverify.defaults"],
     // TODO(b/204562227): move to host_supported to the defaults to include tests
     host_supported: true,
+    apex_available: ["com.android.virt"],
 }
 
 rust_test {