MetadataRetriever: Check null pointer to avoid tombstone crash.

When the app's vm-heap is not enough, memory allocation for big
object like bitmap may failed.

This patch add protection for bitmap creating to avoid segment
fault error in the following GetIntField function.

Change-Id: I63977dc602f4ed395afd11004a0ed027173fb685
Signed-off-by: wang, biao <biao.wang@intel.com>
Signed-off-by: TingX Li <tingx.li@intel.com>
Signed-off-by: Wang LiangX <liangx.wang@intel.com>
Sometimes property service is slow to respond.

Upon boot-up, telephony service will update the system property for
timezone and send out broadcast.The property service won’t handle
the update immediately if the init process was doing something
time-consuming. Meanwhile StatusBar(one broadcast register) may get
the outdated value by reading from system property, because the
update is not handled yet. Then wrong time will be displayed on
status bar.

Change-Id: Ic29b7940b58e01651da4e0bafa7a88b902164bd0
Signed-off-by: Gao,KunX <kunx.gao@intel.com>
Signed-off-by: Guobin Zhang <guobin.zhang@intel.com>