Merge "Let "adb connect" connect to emulators too - adb can now connect to an...

Merge "Let "adb connect" connect to emulators too - adb can now connect to an emulator configured with an arbitrary   pair of <console port, adb port>. These two ports do not have to be   adjacent.   This can be done from the commandline at any time using   adb connect emu:<console_port>,<adb_port> - Emulators running on ports outside the normal range   (5554/5555-5584/5585) register themselves on startup if they follow   the convention "console port+1==abd port". - Emulators outside the normal port range will not be auto-detected on   adb startup as these ports are not probed. - The index into local_transports[] array in transport_local.c does no   longer indicate the port number of the local transport. Use the altered   atransport struct to get the port number. - I have chosen not to document the adb connect emu:console_port,adb_port   syntax on adb's help screen as this might be confusing to most readers   and useful to very few. - I don't expect this to introduce any (backwards) compatibility issues."