add menu keyboard shortcuts
add menu keyboard shortcuts

Test automation requested keys to directly enter recovery or
fastboot when the development menu is used. So we have 'r'
and 'f' to boot into Recovery and Fastboot respectively.

Change-Id: I0c0318d5dd6f336693049d4c5ceafb21dd178218
Signed-off-by: Andrew Boie <aab045b28152628be6af0e556050d0381fd0a34d@intel.com>

android-ia/platform_external_gummiboot,android-ia/platform_external_gummiboot