Cleanup NNAPI VTS tests

This CL includes the following cleanups:
* namespace compression
* remove "using" from header files
* remove no-op code, default no-op constructors
* clang-formats the code

Bug: N/A
Test: mma
Test: VtsHalNeuralnetworksV1_*TargetTest
Change-Id: I023997d8686ca65223858eed3a0881f5444ed2d6
Merged-In: I023997d8686ca65223858eed3a0881f5444ed2d6
(cherry picked from commit bbe5dad26674e8fac9570f52814571f626f09a3b)
diff --git a/neuralnetworks/1.1/vts/functional/ValidateRequest.cpp b/neuralnetworks/1.1/vts/functional/ValidateRequest.cpp
index e0710f1..a4e4ade 100644
--- a/neuralnetworks/1.1/vts/functional/ValidateRequest.cpp
+++ b/neuralnetworks/1.1/vts/functional/ValidateRequest.cpp
@@ -21,17 +21,12 @@
 #include "GeneratedTestHarness.h"
 #include "VtsHalNeuralnetworks.h"
 
-namespace android {
-namespace hardware {
-namespace neuralnetworks {
-namespace V1_1 {
-namespace vts {
-namespace functional {
+namespace android::hardware::neuralnetworks::V1_1::vts::functional {
 
-using ::android::hardware::neuralnetworks::V1_0::ErrorStatus;
-using ::android::hardware::neuralnetworks::V1_0::Request;
-using ::android::hardware::neuralnetworks::V1_0::implementation::ExecutionCallback;
-using ::android::hardware::neuralnetworks::V1_1::IPreparedModel;
+using V1_0::ErrorStatus;
+using V1_0::IPreparedModel;
+using V1_0::Request;
+using V1_0::implementation::ExecutionCallback;
 
 ///////////////////////// UTILITY FUNCTIONS /////////////////////////
 
@@ -45,7 +40,6 @@
     SCOPED_TRACE(message + " [execute]");
 
     sp<ExecutionCallback> executionCallback = new ExecutionCallback();
-    ASSERT_NE(nullptr, executionCallback.get());
     Return<ErrorStatus> executeLaunchStatus = preparedModel->execute(request, executionCallback);
     ASSERT_TRUE(executeLaunchStatus.isOk());
     ASSERT_EQ(ErrorStatus::INVALID_ARGUMENT, static_cast<ErrorStatus>(executeLaunchStatus));
@@ -83,9 +77,4 @@
     removeOutputTest(preparedModel, request);
 }
 
-}  // namespace functional
-}  // namespace vts
-}  // namespace V1_1
-}  // namespace neuralnetworks
-}  // namespace hardware
-}  // namespace android
+}  // namespace android::hardware::neuralnetworks::V1_1::vts::functional