Merge "Remove ndk_platform backend. Use the ndk backend." am: 18e980bac2 am: 27b19b918b

Original change: https://android-review.googlesource.com/c/platform/hardware/libhardware_legacy/+/1789270

Change-Id: I3d7edd928a51e9af582690705db9da9e2d026d40