libpsi: Add explicit header files am: 8771e054e8 am: 41dc0274a3 am: 21eb403400

Original change: https://android-review.googlesource.com/c/platform/system/memory/lmkd/+/1437956

Change-Id: I5ea35dba3983dbc8d62c5dae6065139753b7a586

libpsi/Android.bp

@@ -11,6 +11,7 @@ cc_library {
     ],
     header_libs: [
         "libpsi_headers",
+        "libcutils_headers",
     ],
     export_header_lib_headers: [
         "libpsi_headers",

libpsi/psi.cpp

@@ -24,6 +24,8 @@
 #include <unistd.h>
 
 #include <log/log.h>
+#include <cutils/fs.h>
+#include <stdio.h>
 #include "psi/psi.h"
 
 #define PSI_MON_FILE_MEMORY "/proc/pressure/memory"