Fix potential overflow in Visualizer effect

Bug: 30229821
Change-Id: Idd3c1563dc9d3261e6e168e945005bf133ab2cdb
(cherry picked from commit 099ab280775946e7c36c73fde47f2ee5a2579f53)
(cherry picked from commit 46dc714d523a41a4f886eecbe5b9947a4c900510)
1 file changed