Adjust slider range to be one more than max for base 1 volumes.
Adjust slider range to be one more than max for base 1 volumes.

Bug: 5191642
Change-Id: Id479ce584753fbb56feed22a8506579f2d9e35fd

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