Merge "Remove ndk_platform backend. Use the ndk backend." am: 18e980bac2 am: 27b19b918b am: ef90be2d62

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

Change-Id: I7cd02e886e2c6af101a1ddcba7d567ffab2710d5