Implements RANDOM_MULTINOMIAL CTS/VTS tests.

Bug: 113562775
Test: VtsHalNeuralnetworksV1_2TargetTest --hal_service_instance=android.hardware.neuralnetworks@1.2::IDevice/sample-all
Change-Id: I3d39d056bf5034e01ce9c5c5e3f416a63d7ec8eb
Merged-In: I3d39d056bf5034e01ce9c5c5e3f416a63d7ec8eb
(cherry picked from commit 941d61a62d52b3b5c526c88ace1fc0e538364c71)
diff --git a/neuralnetworks/1.2/vts/functional/Models.h b/neuralnetworks/1.2/vts/functional/Models.h
index f3769bc..2d512fe 100644
--- a/neuralnetworks/1.2/vts/functional/Models.h
+++ b/neuralnetworks/1.2/vts/functional/Models.h
@@ -32,7 +32,7 @@
 namespace vts {
 namespace functional {
 
-using MixedTypedExample = test_helper::MixedTypedExampleType;
+using MixedTypedExample = test_helper::MixedTypedExample;
 
 #define FOR_EACH_TEST_MODEL(FN)                                  \
     FN(add)                                                      \
@@ -243,6 +243,7 @@
     FN(pad_float_1)                                              \
     FN(pad_float_1_relaxed)                                      \
     FN(pad_relaxed)                                              \
+    FN(random_multinomial)                                       \
     FN(relu1_float_1)                                            \
     FN(relu1_float_1_relaxed)                                    \
     FN(relu1_float_2)                                            \