Extend list of adb commands. (#5584)

plugins/adb/_adb

@@ -13,9 +13,13 @@ _1st_arguments=(
 'disconnect:disconnect from a TCP/IP device. Port 5555 is default.'
 'emu:run emulator console command'
 'forward:forward socket connections'
+'get-devpath:print the device path'
+'get-serialno:print the serial number of the device'
+'get-state:print the current state of the device: offline | bootloader | device'
 'help:show the help message'
 'install:push this package file to the device and install it'
 'jdwp:list PIDs of processes hosting a JDWP transport'
+'keygen:generate adb public/private key'
 'kill-server:kill the server if it is running'
 'logcat:view device log'
 'pull:copy file/dir from device'
@@ -30,6 +34,7 @@ _1st_arguments=(
 'start-server:ensure that there is a server running'
 'tcpip:restart host adb in tcpip mode'
 'uninstall:remove this app package from the device'
+'usb:restart the adbd daemon listing on USB'
 'version:show version num'
 'wait-for-device:block until device is online'
 )