ActivityManager: Allow DiskRead for wrap.sh determination

Avoid killing debuggable apps which at the same time have a strict-mode
policy installed.

(cherry picked from commit 62be34e32e)

Bug: 33668201
Test: m
Change-Id: Ic3c56b01fe42a473e28c1d6280526afdc85793df

services/core/java/com/android/server/am/ActivityManagerService.java

@@ -3929,8 +3929,13 @@ public class ActivityManagerService extends IActivityManager.Stub
             if ((app.info.flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
                 // Debuggable apps may include a wrapper script with their library directory.
                 String wrapperFileName = app.info.nativeLibraryDir + "/wrap.sh";
-                if (new File(wrapperFileName).exists()) {
-                    invokeWith = "/system/bin/logwrapper " + wrapperFileName;
+                StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
+                try {
+                    if (new File(wrapperFileName).exists()) {
+                        invokeWith = "/system/bin/logwrapper " + wrapperFileName;
+                    }
+                } finally {
+                    StrictMode.setThreadPolicy(oldPolicy);
                 }
             }