Prevent signed integer overflow in complex path of calc_qmfBuffer().

Bug: 186706541
Test: atest android.media.cts.DecoderTestAacFormat android.media.cts.DecoderTestXheAac android.media.cts.DecoderTestAacDrc
Change-Id: Iae0581ea983912bcf1bc6b3bdc2c0d8ee2f6248e
2 files changed