Clean up, de-dup, and speed up ContextImpl getSystemService()
Clean up, de-dup, and speed up ContextImpl getSystemService()

Bug: 3191436
Change-Id: I343adc016e02d0414b2d48a14e5e62a5cccb7899

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