clang-format for frameworks/ml/nn

This CL formats all of frameworks/ml/nn/* with the following commands:
$ $CLANG_DIR/clang-format --style=file -i `find $NNAPI_DIR -name "*.cpp"`
$ $CLANG_DIR/clang-format --style=file -i `find $NNAPI_DIR -name "*.h"`

where:
* "NNAPI_DIR" is "$ANDROID_BUILD_TOP/frameworks/ml/nn"
* "CLANG_DIR" is "$ANDROID_BUILD_TOP/prebuilts/clang/host/linux-x86/clang-stable/bin"

Bug: N/A
Test: mma
Change-Id: Idddbc7ecaeab76fb0bbee4250830333752a1f29b
Merged-In: Idddbc7ecaeab76fb0bbee4250830333752a1f29b
(cherry picked from commit 67e41a5467d7879b34f613069ade6cf61d5bd633)
diff --git a/runtime/Memory.cpp b/runtime/Memory.cpp
index a2e3de5..20fabfa 100644
--- a/runtime/Memory.cpp
+++ b/runtime/Memory.cpp
@@ -161,5 +161,5 @@
     return idx;
 }
 
-} // namespace nn
-} // namespace android
+}  // namespace nn
+}  // namespace android