[hypervisor] Add capabilities

Allow hypervisor backends to advertize their capabilities such as
dynamic memory sharing with host OS.

Test: m pvmfw_img
Bug: 271493784
Change-Id: Id2d755d790254814538ae6e12efb654bb091975c
diff --git a/libs/hyp/Android.bp b/libs/hyp/Android.bp
index 0f125fc..1d572e5 100644
--- a/libs/hyp/Android.bp
+++ b/libs/hyp/Android.bp
@@ -8,6 +8,7 @@
     srcs: ["src/lib.rs"],
     prefer_rlib: true,
     rustlibs: [
+        "libbitflags",
         "libonce_cell_nostd",
         "libpsci",
         "libuuid_nostd",