charge status: Refactor to enum and move to module of use

The charge status is solely used in the hiddpp20 module, thus put it
into this module.

Related pwr-Solaar#2273

lib/logitech_receiver/hidpp20.py

@@ -44,7 +44,6 @@
 from .common import BatteryStatus
 from .common import FirmwareKind
 from .common import NamedInt
-from .hidpp20_constants import CHARGE_STATUS
 from .hidpp20_constants import DEVICE_KIND
 from .hidpp20_constants import ChargeLevel
 from .hidpp20_constants import ChargeType
@@ -117,6 +116,13 @@ class MappingFlag(Flag):
     DIVERTED = 0x01
 
 
+class ChargeStatus(Flag):
+    CHARGING = 0x00
+    FULL = 0x01
+    NOT_CHARGING = 0x02
+    ERROR = 0x07
+
+
 class FeaturesArray(dict):
     def __init__(self, device):
         assert device is not None
@@ -1879,10 +1885,10 @@ def decipher_battery_voltage(report: bytes):
     charge_type = ChargeType.STANDARD
     if flags & (1 << 7):
         status = BatteryStatus.RECHARGING
-        charge_sts = CHARGE_STATUS[flags & 0x03]
+        charge_sts = ChargeStatus(flags & 0x03)
     if charge_sts is None:
         charge_sts = ErrorCode.UNKNOWN
-    elif charge_sts == CHARGE_STATUS.full:
+    elif ChargeStatus.FULL in charge_sts:
         charge_lvl = ChargeLevel.FULL
         status = BatteryStatus.FULL
     if flags & (1 << 3):

lib/logitech_receiver/hidpp20_constants.py

@@ -179,16 +179,6 @@ class OnboardMode(IntEnum):
     MODE_HOST = 0x02
 
 
-CHARGE_STATUS = NamedInts(charging=0x00, full=0x01, not_charging=0x02, error=0x07)
-
-
-class ChargeStatus(IntEnum):
-    CHARGING = 0x00
-    FULL = 0x01
-    NOT_CHARGING = 0x02
-    ERROR = 0x07
-
-
 class ChargeLevel(IntEnum):
     AVERAGE = 50
     FULL = 90