Update benchmark to v1.4.0-alpha08 (#2145)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -32,7 +32,7 @@ telephoto = "0.14.0"
 xmlutil = "0.90.4-SNAPSHOT"
 junit = "1.2.1"
 uiautomator = "2.4.0-alpha01"
-benchmark = "1.4.0-alpha07"
+benchmark = "1.4.0-alpha08"
 profileinstaller = "1.4.1"
 
 [libraries]