Add public.libraries.txt and linker.config.pb

These two are used by linkerconfig to generate ld.config.txt for
apexes.

Bug: 181093750
Test: MicrodroidTestCase
Change-Id: I7136dc5f3f815b4c42ffda999b19502893978869
diff --git a/microdroid/linker.config.json b/microdroid/linker.config.json
new file mode 100644
index 0000000..c9c5611
--- /dev/null
+++ b/microdroid/linker.config.json
@@ -0,0 +1,17 @@
+{
+  // TODO(b/185391776): Automate the list for microdroid
+  "provideLibs": [
+    "libadbd_auth.so",
+    "libadbd_fs.so",
+    "libc.so",
+    "libcgrouprc.so",
+    "libdl.so",
+    "libdl_android.so",
+    "liblog.so",
+    "libm.so",
+    "libselinux.so",
+    "libstdc++.so",
+    "libvndksupport.so",
+    "libz.so"
+  ]
+}
\ No newline at end of file