message: Fix compile errors by using the new MicroAllocator::Create()
diff: @@ -288,9 +288,9 @@ TF_LITE_MICRO_TEST(OfflinePlannerBranchesAllOnline) {
  TfLiteContext context;
  constexpr size_t arena_size = 4096;
  uint8_t arena[arena_size];
  - tflite::MicroAllocator allocator(&context, model, arena, arena_size,
  - micro_test::reporter);
  - TF_LITE_MICRO_EXPECT_EQ(kTfLiteOk, allocator.FinishTensorAllocation());
  + tflite::MicroAllocator* allocator = tflite::MicroAllocator::Create(
  + &context, model, arena, arena_size, micro_test::reporter);
  + TF_LITE_MICRO_EXPECT_EQ(kTfLiteOk, allocator->FinishTensorAllocation());
  // Since all of the tensors are online planned and the model structure is
  // identical to that in TestAllocationForModelsWithBranches,
  @@ -337,9 +337,9 @@ TF_LITE_MICRO_TEST(OfflinePlannerBasic) {
  TfLiteContext context;
  constexpr size_t arena_size = 4096;
  uint8_t arena[arena_size];
  - tflite::MicroAllocator allocator(&context, model, arena, arena_size,
  - micro_test::reporter);
  - TF_LITE_MICRO_EXPECT_EQ(kTfLiteOk, allocator.FinishTensorAllocation());
  + tflite::MicroAllocator* allocator = tflite::MicroAllocator::Create(
  + &context, model, arena, arena_size, micro_test::reporter);
  + TF_LITE_MICRO_EXPECT_EQ(kTfLiteOk, allocator->FinishTensorAllocation());
  uint8_t* start = context.tensors[0].data.uint8;
  TF_LITE_MICRO_EXPECT_EQ(0, context.tensors[0].data.uint8 - start);
  @@ -382,9 +382,9 @@ TF_LITE_MICRO_TEST(OfflinePlannerOverlappingAllocation) {
  TfLiteContext context;
  constexpr size_t arena_size = 4096;
  uint8_t arena[arena_size];
  - tflite::MicroAllocator allocator(&context, model, arena, arena_size,
  - micro_test::reporter);
  - TF_LITE_MICRO_EXPECT_EQ(kTfLiteOk, allocator.FinishTensorAllocation());
  + tflite::MicroAllocator* allocator = tflite::MicroAllocator::Create(
  + &context, model, arena, arena_size, micro_test::reporter);
  + TF_LITE_MICRO_EXPECT_EQ(kTfLiteOk, allocator->FinishTensorAllocation());
  uint8_t* start = context.tensors[0].data.uint8;
  TF_LITE_MICRO_EXPECT_EQ(0, context.tensors[0].data.uint8 - start);
  @@ -430,9 +430,9 @@ TF_LITE_MICRO_TEST(OfflinePlannerOfflineOnline) {
  TfLiteContext context;
  constexpr size_t arena_size = 4096;
  uint8_t arena[arena_size];
  - tflite::MicroAllocator allocator(&context, model, arena, arena_size,
  - micro_test::reporter);
  - TF_LITE_MICRO_EXPECT_EQ(kTfLiteOk, allocator.FinishTensorAllocation());
  + tflite::MicroAllocator* allocator = tflite::MicroAllocator::Create(
  + &context, model, arena, arena_size, micro_test::reporter);
  + TF_LITE_MICRO_EXPECT_EQ(kTfLiteOk, allocator->FinishTensorAllocation());
  uint8_t* start = context.tensors[0].data.uint8;
  TF_LITE_MICRO_EXPECT_EQ(0, context.tensors[0].data.uint8 - start);
  