Fix NPE when Spinner is reused.
Fix NPE when Spinner is reused.

Bug: 2958228
Change-Id: I2c5e322b92fd4896361d02a307d0ba0ef3d33029

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base