libsensors: new sensors HAL for otter/otter2

Change-Id: I30d54e4d1681449ea4f45d8a4557beced92f0dc0
sensors: correct for stock rotation (270)

Change-Id: I5eb7ec533136b7f2720f18623c36080ceddc4cf9
sensors: fix default orientation

Change-Id: I0fc844559b288a95cb8d5c9aee32050b992fa8a1
sensors: turn off event debug

Change-Id: I6850f80b074b5a753f3d602fc9092f32434a1e2f