The ndk_platform backend will soon be deprecated because the ndk backend
can serve the same purpose. This is to eliminate the confusion about
having two variants (ndk and ndk_platform) for the same ndk backend.
Bug: 161456198
Test: m
Merged-In: I14a1c57bd06f1f2aa52491f779c7030d4de03547
Change-Id: I7b9055909b901843631314b9577a9e578a739d00
* Even if amplitude is > 0 resulting intensity might be 0 sometimes
* New devices just return EINVAL in kernel and ignore it, but on older
ones this may result in very weak vibration
Change-Id: I5d290d60d8414ca747dce4af847f190e3caedbe0
Jiyong Park