Use the beta or dev build of BlueZ Previously, we chose an older BlueZ beta build, R108-15183.71.0, as a golden build for calculating the OSR and NSM values. We are now selecting a newer BlueZ dev build, R117-15526.0.0, as the new golden build to reflect the improved BlueZ test results. This patch checks the availability of either the beta or dev build and accordingly adopts it. BUG=b:269681390, b:274698307 TEST=Run the unit tests. Change-Id: I8951f3068b09b6fb81a60c42339dbea7473e1b65 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/bluetooth/+/4680433 Tested-by: Shyh-In Hwang <[email protected]> Reviewed-by: Dean Liao <[email protected]> Commit-Queue: Shyh-In Hwang <[email protected]> Reviewed-by: Manish Mandlik <[email protected]> Auto-Submit: Shyh-In Hwang <[email protected]>