Remove redundant local parameters in Client

The Android version upgrade modified the declaration of createLayer and mirrorLayer functions in SurfaceFlinger, removed multiple parameters of objects such as IBinder, and also modified the mirrorDisplay function in Client, causing their local variables sp<IBinder> handle to be redundant.

Signed-off-by:
Shuangxi Xiang <xiangshuangxi@xiaomi.corp-partner.google.com>

Change-Id: Ifa8db1993fa46209a9d935c9ff588d2d0dc4c5f8