Fix GraphicsStatsValidationTest

spinSleep(x) may only sleep for (x-1+eps) ms before this fix.

Bug: b/171449940
Test: atest com.android.server.cts.GraphicsStatsValidationTest#testDaveyDrawFrame
Change-Id: Iaa723cdf10738c46db957514d850f87d13afd4fc
1 file changed