[ihtiebce] Android control keys

While many Android alternate keyboard apps provide tons of Unicode characters to input, we often want keyboard buttons not representable by Unicode.

From the physical Droid keyboard:
Left and right shift (separately remappable by an app)
Caps lock
Arrow keys (D pad) up down left right
D pad center
Android seach
Android menu
Backspace
Delete back to beginning of line (alt-del)
Tab
Enter

From the Swype app:
Voice input
Select all
Pgup pgdn home end
Beginning of buffer, end of buffer
Select text (to be followed by cursor actions)
Cut copy paste
Delete char forward
Delete word back
Change input method

From the Full Keyboard app:
Dismiss keyboard
Pwd (Don't know what this is)
VolUp VolDn
Clear (?)
Camera
^A through ^Z
^@ ^[ (escape) ^\ ^] ^^ ^_

Possibly wanted, don't know if possible:
Do not add to user dictionary
ANSI control sequences
Control Meta Super Hyper
Windows keys
F1 through F12
Enter Unicode by code number
Everything else if you had attached a full physical keyboard perhaps with USB OTG or Bluetooth.  Perhaps enter keyboard scan code number.