Move safety constants to opendbc (commaai#1714)

* move safety constants to opendbc

* todo

opendbc/safety/__init__.py

@@ -0,0 +1,37 @@
+class Safety:
+  # matches opendbc.structs.CarParams.SafetyModel
+  # TODO: just use SafetyModel in panda repo
+  SAFETY_SILENT = 0
+  SAFETY_HONDA_NIDEC = 1
+  SAFETY_TOYOTA = 2
+  SAFETY_ELM327 = 3
+  SAFETY_GM = 4
+  SAFETY_HONDA_BOSCH_GIRAFFE = 5
+  SAFETY_FORD = 6
+  SAFETY_HYUNDAI = 8
+  SAFETY_CHRYSLER = 9
+  SAFETY_TESLA = 10
+  SAFETY_SUBARU = 11
+  SAFETY_MAZDA = 13
+  SAFETY_NISSAN = 14
+  SAFETY_VOLKSWAGEN_MQB = 15
+  SAFETY_ALLOUTPUT = 17
+  SAFETY_GM_ASCM = 18
+  SAFETY_NOOUTPUT = 19
+  SAFETY_HONDA_BOSCH = 20
+  SAFETY_VOLKSWAGEN_PQ = 21
+  SAFETY_SUBARU_PREGLOBAL = 22
+  SAFETY_HYUNDAI_LEGACY = 23
+  SAFETY_HYUNDAI_COMMUNITY = 24
+  SAFETY_STELLANTIS = 25
+  SAFETY_FAW = 26
+  SAFETY_BODY = 27
+  SAFETY_HYUNDAI_CANFD = 28
+
+
+class ALTERNATIVE_EXPERIENCE:
+  DEFAULT = 0
+  DISABLE_DISENGAGE_ON_GAS = 1
+  DISABLE_STOCK_AEB = 2
+  RAISE_LONGITUDINAL_LIMITS_TO_ISO_MAX = 8
+  ALLOW_AEB = 16