Change /dalvik-cache to be owned by root.

Bug: 16875245

(cherry picked from commit 79bf4007f5)

Change-Id: I29a70215a2207bc4e0db02ab751d32a68edf4b66

cmds/app_process/app_main.cpp

@@ -161,17 +161,17 @@ static void maybeCreateDalvikCache() {
     LOG_ALWAYS_FATAL_IF((numChars >= PATH_MAX || numChars < 0),
             "Error constructing dalvik cache : %s", strerror(errno));
 
-    int result = mkdir(dalvikCacheDir, 0771);
+    int result = mkdir(dalvikCacheDir, 0711);
     LOG_ALWAYS_FATAL_IF((result < 0 && errno != EEXIST),
             "Error creating cache dir %s : %s", dalvikCacheDir, strerror(errno));
 
     // We always perform these steps because the directory might
     // already exist, with wider permissions and a different owner
     // than we'd like.
-    result = chown(dalvikCacheDir, AID_SYSTEM, AID_SYSTEM);
+    result = chown(dalvikCacheDir, AID_ROOT, AID_ROOT);
     LOG_ALWAYS_FATAL_IF((result < 0), "Error changing dalvik-cache ownership : %s", strerror(errno));
 
-    result = chmod(dalvikCacheDir, 0771);
+    result = chmod(dalvikCacheDir, 0711);
     LOG_ALWAYS_FATAL_IF((result < 0),
             "Error changing dalvik-cache permissions : %s", strerror(errno));
 }