Use unary operator instead of == bool

am: b749ebde2c

Change-Id: I61a1434e9fc7f86630b514aba6e0540937a1aa4c

diff --cc bta/pan/bta_pan_act.cc
Simple merge

diff --cc btif/src/btif_hf.cc
Simple merge

diff --cc btif/src/btif_sdp_server.cc
Simple merge

diff --cc stack/sdp/sdp_server.cc
Simple merge