Add missing back icon in action bar of Network Operator

Change-Id: I574557bb5cc91d24f17b9cc3a854a022c1ccadcb
Phone: squashed cursor leak fixes from AOSP

Fix a Cursor leak

When cursor is done, the cursor must be closed to avoid cursor leak.

Change-Id: I627cf2c8a64a220d6fd104505b852daca0928190

Fix a Cursor leak

When cursor is done, the cursor must be closed to avoid cursor leak.

Change-Id: I5f750a6bb499f86d4c76da40d171e9edfe6981d2