Change MCS for WiFi sensitivity tests.

This CL changes the low rate sensitivity tests from MCS0 to MCS2 to
avoid ping losses due to low rate links.

Test: Done
Bug: None

Change-Id: I2a140dd7b44e71bb22ed2c7100545c69baa69b53
Signed-off-by: Omar El Ayach <oelayach@google.com>
diff --git a/acts/tests/google/wifi/WifiSensitivityTest.py b/acts/tests/google/wifi/WifiSensitivityTest.py
index 2c8f1e3..99c2505 100644
--- a/acts/tests/google/wifi/WifiSensitivityTest.py
+++ b/acts/tests/google/wifi/WifiSensitivityTest.py
@@ -768,9 +768,9 @@
         requested_channels = [6, 36, 149]
         requested_rates = [
             self.RateTuple(8, 1, 86.7),
-            self.RateTuple(0, 1, 7.2),
+            self.RateTuple(2, 1, 21.7),
             self.RateTuple(8, 2, 173.3),
-            self.RateTuple(0, 2, 14.4)
+            self.RateTuple(2, 2, 43.3)
         ]
         self.tests = self.generate_test_cases(requested_channels,
                                               requested_rates, ['2x2'],
@@ -783,7 +783,7 @@
         requested_channels = [6, 36, 149]
         requested_rates = [
             self.RateTuple(8, 1, 86.7),
-            self.RateTuple(0, 1, 7.2),
+            self.RateTuple(2, 1, 21.7)
         ]
         self.tests = self.generate_test_cases(requested_channels,
                                               requested_rates, ['2x2'],
@@ -795,9 +795,9 @@
         WifiOtaSensitivityTest.__init__(self, controllers)
         requested_rates = [
             self.RateTuple(8, 1, 86.7),
-            self.RateTuple(0, 1, 7.2),
+            self.RateTuple(2, 1, 21.7),
             self.RateTuple(8, 2, 173.3),
-            self.RateTuple(0, 2, 14.4)
+            self.RateTuple(2, 2, 43.3)
         ]
         self.tests = self.generate_test_cases(
             [1, 6, 11, 36, 40, 44, 48, 149, 153, 157, 161], requested_rates,