chromeos-config: Add schema and REAME for activity proximity

Add powerd prefs so that powerd can support activity sensor for
UserProximityWatcher.

BUG=b:123434029
TEST=cros_config_host/power_manager_prefs_gen_schema_unittest.py

Cq-Depend: chromium:2359931
Change-Id: I8861411b6cfa15dfeccfb92e40c4cc4793bb117e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2589496
Commit-Queue: Ching-Kang Yen <chingkang@chromium.org>
Tested-by: Ching-Kang Yen <chingkang@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
diff --git a/chromeos-config/README.md b/chromeos-config/README.md
index a9f6362..36fb3e1 100644
--- a/chromeos-config/README.md
+++ b/chromeos-config/README.md
@@ -635,8 +635,10 @@
 | retry-suspend-attempts | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
 | retry-suspend-ms | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
 | set-cellular-transmit-power-dpr-gpio | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
+| set-cellular-transmit-power-for-activity-proximity | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
 | set-cellular-transmit-power-for-proximity | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
 | set-cellular-transmit-power-for-tablet-mode | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
+| set-wifi-transmit-power-for-activity-proximity | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
 | set-wifi-transmit-power-for-proximity | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
 | set-wifi-transmit-power-for-tablet-mode | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
 | shutdown-from-suspend-sec | string |  | False |  | False | For details, see https://chromium.googlesource.com/chromiumos/platform2/+/HEAD/power_manager/ |
diff --git a/chromeos-config/cros_config_host/power_manager_prefs_schema.yaml b/chromeos-config/cros_config_host/power_manager_prefs_schema.yaml
index 2c45b71..2c6f487 100644
--- a/chromeos-config/cros_config_host/power_manager_prefs_schema.yaml
+++ b/chromeos-config/cros_config_host/power_manager_prefs_schema.yaml
@@ -144,8 +144,10 @@
   suspend-to-idle: *powerd_prefs_default
   set-wifi-transmit-power-for-tablet-mode: *powerd_prefs_default
   set-wifi-transmit-power-for-proximity: *powerd_prefs_default
+  set-wifi-transmit-power-for-activity-proximity: *powerd_prefs_default
   set-cellular-transmit-power-for-tablet-mode: *powerd_prefs_default
   set-cellular-transmit-power-for-proximity: *powerd_prefs_default
+  set-cellular-transmit-power-for-activity-proximity: *powerd_prefs_default
   set-cellular-transmit-power-dpr-gpio: *powerd_prefs_default
   enable-console-during-suspend: *powerd_prefs_default
   max-dark-suspend-delay-timeout-ms: *powerd_prefs_default