Define NEEDS_VECTORIMPL_SYMBOLS to fix libcamera.so loading

E/HAL     (  101): dlopen failed: could not load library "libcamera.so" needed by
 "camera.msm7x27.so"; caused by cannot locate symbol "_ZN7android10VectorImpl19reservedVectorImpl1Ev"
  referenced by "libcamera.so"...

Change-Id: I2b55f4136a0e649e64a80ac650142a363fb0cf0c