s4-common: remap capacitive keys in CWM

Back = Back (unchanged)
Home = Down
App Switch = Select

Change-Id: I708b352eeed87e826dd7af0958356e09e1283b44
s4-common: Move custom recovery font to device trees

Change-Id: I52b036ba728c4a4c39e1621db76c681ee3c6fee4
s4-common: set the bootloader msg offset

HTC offsets the bootloader message to 0x800 (2048) in /misc. This
prevents overwriting other stored variables in misc, such as the most
recently installed stock OS version.

Change-Id: I8499c9a3786820d105cc79968f010e16466124b3
s4-common: Enable separate VOIP use cases

Change-Id: I065437a231eca581be28093b32e0c6bfd12296bd