Add use_bionic_libs macro

... to dedupe rules for allowing access to bootstrap bionic libraries.

Bug: N/A
Test: m
Change-Id: I575487416a356c22f5f06f1713032f11d979d7d4
diff --git a/microdroid/system/private/init.te b/microdroid/system/private/init.te
index ff3f6f5..b8db74a 100644
--- a/microdroid/system/private/init.te
+++ b/microdroid/system/private/init.te
@@ -437,8 +437,7 @@
 allow init proc_pressure_mem:file { rw_file_perms setattr };
 
 # init is using bootstrap bionic
-allow init system_bootstrap_lib_file:dir r_dir_perms;
-allow init system_bootstrap_lib_file:file { execute read open getattr map };
+use_bootstrap_libs(init)
 
 # stat the root dir of fuse filesystems (for the mount handler)
 allow init fuse:dir { search getattr };