Mark gpu_usage as const

Bug: 131181334
Test: make
Change-Id: I317e265594471e0a0eaf81a6520d497a558a2a32
Merged-In: I2feefa3e180a6f19be532db3e9f11b593bcdf47f
Signed-off-by: Roman Kiryanov <rkir@google.com>
1 file changed