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
diff --git a/neuralnetworks/1.2/vts/functional/ValidateBurst.cpp b/neuralnetworks/1.2/vts/functional/ValidateBurst.cpp
index cb801eb..844e879 100644
--- a/neuralnetworks/1.2/vts/functional/ValidateBurst.cpp
+++ b/neuralnetworks/1.2/vts/functional/ValidateBurst.cpp
@@ -28,17 +28,14 @@
 #include <android-base/logging.h>
 #include <cstring>
 
-namespace android {
-namespace hardware {
-namespace neuralnetworks {
-namespace V1_2 {
-namespace vts {
-namespace functional {
+namespace android::hardware::neuralnetworks::V1_2::vts::functional {
 
-using ::android::nn::ExecutionBurstController;
-using ::android::nn::RequestChannelSender;
-using ::android::nn::ResultChannelReceiver;
-using ExecutionBurstCallback = ::android::nn::ExecutionBurstController::ExecutionBurstCallback;
+using nn::ExecutionBurstController;
+using nn::RequestChannelSender;
+using nn::ResultChannelReceiver;
+using V1_0::ErrorStatus;
+using V1_0::Request;
+using ExecutionBurstCallback = ExecutionBurstController::ExecutionBurstCallback;
 
 // This constant value represents the length of an FMQ that is large enough to
 // return a result from a burst execution for all of the generated test cases.
@@ -401,9 +398,4 @@
     ASSERT_NO_FATAL_FAILURE(validateBurstSanitized(preparedModel, request));
 }
 
-}  // namespace functional
-}  // namespace vts
-}  // namespace V1_2
-}  // namespace neuralnetworks
-}  // namespace hardware
-}  // namespace android
+}  // namespace android::hardware::neuralnetworks::V1_2::vts::functional