[battery-udev] Enablers for forced udev property refreshing. JB#49693

For example pinephone sends udev notification about charger disconnect, but
not about battery making related transition to discharging state - which
leaves system believing battery is still getting charged.

Add enablers for optionally refreshing properties of all power supply
devices whenever at least one device is reporting changes.

Forced refresh is disabled by default. Enabling should be done only
on those devices where it is needed, via hw specific mce configuration.

Signed-off-by: Simo Piiroinen <simo.piiroinen@jollamobile.com>

inifiles/battery-udev-settings.ini

@@ -0,0 +1,28 @@
+# Configuration file for MCE - udev battery plugin
+
+[BatteryUDevSettings]
+
+# Settings related to orking around missing / too
+# infrequent udev change notifications about power
+# supply devices.
+
+# Some devices might not send udev notifications
+# about all power supply devices e.g. PinePhone at
+# the moment does notify about charger disconnect,
+# but not about battery making simultaneous
+# transition to discharging state.
+#
+# It is possible to instruct udev battery plugin to
+# poll all power supply devices whenever notification
+# about change in one is received.
+#
+# This is relatively costly operation and should be
+# enabled only when necessary.
+#
+# To enable:
+#
+# RefreshOnNotify = true
+#
+# Default is:
+#
+# RefreshOnNotify = false