Add apf experiment.

See go/pixel-perf-apf-experiment for more info.

Bug: 365855872
Test: build/flash, set .Perf__apf_experiment=true and observe vendor.powerhal.apf_enabled=false, .apf_disabled=true
Flag: NONE controlled by Mendel instead
Change-Id: Iee32c4b160d5013fbbd893765d3df54c1befa458
Signed-off-by: Dmitry Skiba <dskiba@google.com>
diff --git a/performance/experiments/experiments.mk b/performance/experiments/experiments.mk
index 191332d..b14b823 100644
--- a/performance/experiments/experiments.mk
+++ b/performance/experiments/experiments.mk
@@ -3,3 +3,4 @@
 PRODUCT_PACKAGES += pixel-experiments-recovery.sh
 
 include device/google/gs-common/performance/experiments/kswapd/kswapd.mk
+include device/google/gs-common/performance/experiments/apf/apf.mk