Split RSSI tests into two classes

This CL splits RSSI tests with active traffic into two classes/test
suites to get around Mobile Harness time limits.

Test: Done
Bug: 65563975

Change-Id: Ia8e5325c5b62763a566a8a187cae92c6adc18902
(cherry picked from commit 8e0fd21ca68ed28bce5b1736852afd4f4e8843d2)
diff --git a/acts/tests/google/wifi/WifiRssiTest.py b/acts/tests/google/wifi/WifiRssiTest.py
index 82b38fe..756f1fe 100644
--- a/acts/tests/google/wifi/WifiRssiTest.py
+++ b/acts/tests/google/wifi/WifiRssiTest.py
@@ -444,6 +444,11 @@
         #TODO: Implement test that looks at RSSI stability at fixed attenuation
         pass
 
+
+class WifiRssi_2GHz_ActiveTraffic_Test(WifiRssiTest):
+    def __init__(self, controllers):
+        base_test.BaseTestClass.__init__(self, controllers)
+
     @test_tracker_info(uuid='ae54b7cc-d76d-4460-8dcc-2c439265c7c9')
     def test_rssi_vs_atten_ch1_VHT20_ActiveTraffic(self):
         self._test_rssi_vs_atten()
@@ -488,6 +493,11 @@
     def test_rssi_vs_atten_ch11_VHT20_ActiveTraffic(self):
         self._test_rssi_vs_atten()
 
+
+class WifiRssi_5GHz_ActiveTraffic_Test(WifiRssiTest):
+    def __init__(self, controllers):
+        base_test.BaseTestClass.__init__(self, controllers)
+
     @test_tracker_info(uuid='a33a93ac-604a-414f-ae96-42dffbe59a93')
     def test_rssi_vs_atten_ch36_VHT20_ActiveTraffic(self):
         self._test_rssi_vs_atten()