Camera2: fix camera has stopped" after long press camera key

When Long press camera key to open camera, mRootView has not
been created in photoModule.init.

mRootView must be created before using it.

CRs-Fixed: 725790

Change-Id: I70cd4ac911c79a15c52d47147414bf1fcee65b53
Merge branch 'cm-11.0' into kk_mkt