ndk backend: comparison operators

These were clearly written in order to support C++ and NDK backend, but
not enabled, so enabling them there.

Bug: 175018841
Test: atest CtsNdkBinderTestCases
Change-Id: I2c0da9653f36f98c28c09715d680de85af0dc59a
Merged-In: I2c0da9653f36f98c28c09715d680de85af0dc59a
2 files changed