Fix integer underflow in ESDS processing

Several arithmetic operations within parseESDescriptor could underflow, leading
to an out-of-bounds read operation. Ensure that subtractions from 'size' do not
cause it to wrap around.

Bug: 20139950
Change-Id: I0d1b136ce68fd7c6f606ce66714bf644cfb2961c
(cherry picked from commit 07c0f59d)