storage: turn off pixel storage debugging code on user builds

The debugging code introduces too much performance overhead for random I/O operations.
Only enable the debugging feature on non-user builds.

Bug: 284231590
Test: boot device
Change-Id: Idf6852060dfd3a250d92147a3ee0f1fe9e6140d4
Signed-off-by: Randall Huang <huangrandall@google.com>

storage/Android.bp

@@ -5,6 +5,7 @@ package {
 cc_binary {
     name: "dump_storage",
     srcs: ["dump_storage.cpp"],
+    init_rc: ["init.storage.rc"],
     cflags: [
         "-Wall",
         "-Wextra",