androidfw: resolve 64-bit build issues

- uid_t/gid_t cast to unsigned long
- unused argument warnings
- tab and space requirements

Change-Id: Ib446d8165b9082be02edb55e6b71fd1a03ea3431
diff --git a/libs/androidfw/BackupData.cpp b/libs/androidfw/BackupData.cpp
index 4e3b522..2d0f755 100644
--- a/libs/androidfw/BackupData.cpp
+++ b/libs/androidfw/BackupData.cpp
@@ -289,7 +289,7 @@
                     (int)(m_pos - sizeof(m_header)), (int)m_header.type);
             m_status = EINVAL;
     }
-    
+
     return m_status;
 }