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/1.0/vts/functional/BasicTests.cpp b/neuralnetworks/1.0/vts/functional/BasicTests.cpp
index 945c406..5727ca4 100644
--- a/neuralnetworks/1.0/vts/functional/BasicTests.cpp
+++ b/neuralnetworks/1.0/vts/functional/BasicTests.cpp
@@ -18,12 +18,7 @@
 
 #include "VtsHalNeuralnetworks.h"
 
-namespace android {
-namespace hardware {
-namespace neuralnetworks {
-namespace V1_0 {
-namespace vts {
-namespace functional {
+namespace android::hardware::neuralnetworks::V1_0::vts::functional {
 
 // create device test
 TEST_F(NeuralnetworksHidlTest, CreateDevice) {}
@@ -38,19 +33,14 @@
 // initialization
 TEST_F(NeuralnetworksHidlTest, GetCapabilitiesTest) {
     Return<void> ret =
-        device->getCapabilities([](ErrorStatus status, const Capabilities& capabilities) {
-            EXPECT_EQ(ErrorStatus::NONE, status);
-            EXPECT_LT(0.0f, capabilities.float32Performance.execTime);
-            EXPECT_LT(0.0f, capabilities.float32Performance.powerUsage);
-            EXPECT_LT(0.0f, capabilities.quantized8Performance.execTime);
-            EXPECT_LT(0.0f, capabilities.quantized8Performance.powerUsage);
-        });
+            device->getCapabilities([](ErrorStatus status, const Capabilities& capabilities) {
+                EXPECT_EQ(ErrorStatus::NONE, status);
+                EXPECT_LT(0.0f, capabilities.float32Performance.execTime);
+                EXPECT_LT(0.0f, capabilities.float32Performance.powerUsage);
+                EXPECT_LT(0.0f, capabilities.quantized8Performance.execTime);
+                EXPECT_LT(0.0f, capabilities.quantized8Performance.powerUsage);
+            });
     EXPECT_TRUE(ret.isOk());
 }
 
-}  // namespace functional
-}  // namespace vts
-}  // namespace V1_0
-}  // namespace neuralnetworks
-}  // namespace hardware
-}  // namespace android
+}  // namespace android::hardware::neuralnetworks::V1_0::vts::functional