init.harmony.rc: Tweak modem setting
Revert "gps: Revert power management for now"

This reverts commit 939b2a96c1e86f442a3f6dddef8f00a14f3ca89c.

Add back power management
Use ejtagle GPS PM module
overlay: frameworks: Add config_deviceHardwareKeys in config.xml
Although default value of config_deviceHardwareKeys is 15 let's define explicidly, since tenchi reports this fix buttons.
init.harmony.rc: Change read ahead for sdcards to 1024
Tenchi reports this change improves performance, so let's try it.
Add BOARD_ADAM condition to libs