vold: Fix a few bugs

 - share command was taking wrong arguments
 - shared command was returning two termination codes
 - Force FAT32 cluster size to 4k when formatting
Signed-off-by: San Mehat <san@google.com>
diff --git a/VolumeManager.cpp b/VolumeManager.cpp
index 96a691b..ba92768 100644
--- a/VolumeManager.cpp
+++ b/VolumeManager.cpp
@@ -537,9 +537,9 @@
     }
 
     if (v->getState() != Volume::State_Shared) {
-        *enabled = true;
-    } else {
         *enabled = false;
+    } else {
+        *enabled = true;
     }
     return 0;
 }