rename a class

Signed-off-by: Takashiro <takashiro@qq.com>
rename ActivityStackControlUtil into ActivityManager

Signed-off-by: Takashiro <takashiro@qq.com>
pack alibaba's SIFT into a jar

Signed-off-by: Takashiro <takashiro@qq.com>
search local hotspots

Signed-off-by: Takashiro <takashiro@qq.com>
Load local gallery

Signed-off-by: Takashiro <takashiro@qq.com>