Use ifdef for VectorImpl compatability symbols

Use BOARD_NEEDS_VECTORIMPL_SYMBOLS := true to add the compatibility
symbols for old blobs such as the 4.3 grouper blobs. These symbols
conflict with libwvdrmengine.so
add RGBA_5551 and RGBA_4444 pixel formats

Change-Id: Icdceaf960dd4817966ffd219ce73a8ae04a2aae9
Signed-off-by: Arnav Gupta <championswimmer@aokp.co>