flo: update prebuilt kernel, DO NOT MERGE 6537a16 TouchScreen: update touch firmware to A042. 5a0ce26 TouchScreen: update touch firmware to A040. Bug: 10008791 Bug: 10175543 Change-Id: I86a8fbe3b21944c645f41a70b943da59ba46c1ec Signed-off-by: Ed Tam <etam@google.com>