[Feat] (DeviceBench): scripted in-game FPS benchmark harness (FCLFPS logcat sampling, MTK ppm frequency pinning, thermal gate, GPU busy telemetry)

tools/device_bench/devices/odinlite.env

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+# Device profile: AYN Odin Lite (MT6877 Dimensity 900, Mali-G68 MC4, Android 11)
+# 2x A78 (policy6, max 2400000) + 6x A55 (policy0, max 2000000), GPU top OPP 902MHz.
+# Panel: 1080x1920 @ 60Hz (presented FPS caps at 60 - render-side FPS comes from the
+# FCLFPS logcat tag, which counts eglSwapBuffers; it is NOT vsync-capped when the
+# game runs with vsync off).
+DEVICE_SERIAL=MTK0002207301023500
+
+# Frequency pins, enforced via /proc/ppm/policy/hard_userlimit_* (plain cpufreq
+# sysfs writes are reverted by the vendor game boost within seconds). The stock
+# performance_mode=2 boost pins big=2400000/little=2000000 anyway, so we pin at
+# the same values; bench.sh records live freqs at window end to catch thermal
+# clamping. Fan must be in sport mode (settings put global fan_mode 3) or the
+# SoC runs away past 80C.
+CPU_BIG_POLICY=policy6
+CPU_BIG_FREQ=2400000
+CPU_LITTLE_POLICY=policy0
+CPU_LITTLE_FREQ=2000000
+
+# GPU pin via legacy MTK gpufreq: echo <khz> > /proc/gpufreq/gpufreq_opp_freq
+# (0 restores DVFS). Top OPP on this device is 902000.
+GPU_PIN_KHZ=902000
+
+# Thermal gate: wait until this zone is at or below the threshold before starting.
+THERMAL_ZONE_TYPE=mtktscpu
+THERMAL_START_MAX_MC=50000
+
+# MTK ged GPU utilization node; first field of the triple is busy %.
+GPU_UTIL_NODE=/sys/kernel/ged/hal/gpu_utilization
+GPU_CURFREQ_NODE=/sys/kernel/ged/hal/current_freqency