Ignore EEXIST errors when creating pkg specific dirs.

Some of the pkg specific dirs could be created by zygote
and vold in parallel, so ignore any EEXIST errors while
creating these dirs.

Bug: 118185801
Test: manual

Change-Id: Ifaa9998131764304867ac027af335414dbfc291c

Utils.cpp

@@ -235,7 +235,7 @@ status_t CreateDir(const std::string& dir, mode_t mode) {
         PLOG(ERROR) << "Failed to stat " << dir;
         return -errno;
     }
-    if (TEMP_FAILURE_RETRY(mkdir(dir.c_str(), mode)) == -1) {
+    if (TEMP_FAILURE_RETRY(mkdir(dir.c_str(), mode)) == -1 && errno != EEXIST) {
         PLOG(ERROR) << "Failed to mkdir " << dir;
         return -errno;
     }

VolumeManager.cpp

@@ -680,7 +680,7 @@ int VolumeManager::prepareSandboxTargets(userid_t userId,
         } else if (errno != ENOENT) {
             PLOG(ERROR) << "Failed to faccessat " << mntTargetRoot << "/" << package;
         }
-        if (TEMP_FAILURE_RETRY(mkdirat(dfd.get(), package.c_str(), 0755)) == -1) {
+        if (TEMP_FAILURE_RETRY(mkdirat(dfd.get(), package.c_str(), 0755)) == -1 && errno != EEXIST) {
             PLOG(ERROR) << "Failed to mkdirat " << mntTargetRoot << "/" << package;
             return -errno;
         }
@@ -718,7 +718,8 @@ int VolumeManager::prepareSandboxTargets(userid_t userId,
             } else if (errno != ENOENT) {
                 PLOG(ERROR) << "Failed to faccessat " << pkgMountTarget << "/" << volumeLabel;
             }
-            if (TEMP_FAILURE_RETRY(mkdirat(packageFd.get(), volumeLabel.c_str(), 0755)) == -1) {
+            if (TEMP_FAILURE_RETRY(mkdirat(packageFd.get(), volumeLabel.c_str(), 0755)) == -1 &&
+                errno != EEXIST) {
                 PLOG(ERROR) << "Failed to mkdirat " << pkgMountTarget << "/" << volumeLabel;
                 return -errno;
             }
@@ -742,7 +743,8 @@ int VolumeManager::prepareSandboxTargets(userid_t userId,
         }
         if (TEMP_FAILURE_RETRY(faccessat(packageFd.get(), "self", F_OK, 0)) == -1) {
             if (errno == ENOENT) {
-                if (TEMP_FAILURE_RETRY(mkdirat(packageFd.get(), "self", 0755)) == -1) {
+                if (TEMP_FAILURE_RETRY(mkdirat(packageFd.get(), "self", 0755)) == -1 &&
+                    errno != EEXIST) {
                     PLOG(ERROR) << "Failed to mkdirat " << pkgMountTarget << "/self";
                     return -errno;
                 }