Clean up Logging.

Use the pattern if (V) Log.v(...); for logging. The Android style prefers curly braces, but for log lines it is ok to use a one-liner to keep the code manageable.

Remove spaces from some log tags, and rename TAG BluetoothShareProvider to BluetoothOpp.

Rename LOGVV to V, and LOGV to D.

Just before ship we will change Constants.DEBUG and Constants.VERBOSE to false to compile out all the logging code.