Rename BufferRole.frequency -> probability -- HAL.

"Frenquency" often refers to the number of occurrences over a period of
time, while "probability" refers to the number of occurrences of one
event over the number of occurrences of all events. "Probability" is a
better name for this field.

Fixes: 183117895
Test: VtsHalNeuralnetworksTargetTest
Test: NNT_static
Change-Id: Ic86f73b8be2aed567ae4ca17bdb3a57c658fb349
diff --git a/neuralnetworks/aidl/vts/functional/GeneratedTestHarness.cpp b/neuralnetworks/aidl/vts/functional/GeneratedTestHarness.cpp
index 7a042ed..098ed94 100644
--- a/neuralnetworks/aidl/vts/functional/GeneratedTestHarness.cpp
+++ b/neuralnetworks/aidl/vts/functional/GeneratedTestHarness.cpp
@@ -101,7 +101,7 @@
         ASSERT_NE(result, nullptr);
 
         // Prepare arguments.
-        BufferRole role = {.modelIndex = 0, .ioIndex = index, .frequency = 1.0f};
+        BufferRole role = {.modelIndex = 0, .ioIndex = index, .probability = 1.0f};
         std::vector<BufferRole> inputRoles, outputRoles;
         if constexpr (ioType == IOType::INPUT) {
             inputRoles = {role};