plugin-api: deviced: Add syscommon_plugin_deviced_battery_is_possible_to_notify_batte...

plugin-api: deviced: Add syscommon_plugin_deviced_battery_is_possible_to_notify_battery_full()

To use deviced plugin battery module, plugin backend battery module getter/setter are added.
And, new plugin module definition "SYSCOMMON_PLUGIN_MODULE_DEVICED_BATTERY" is added.
Also, to utilize plugin backend battery module function,
new battery interface header and source file was created.

To use plugin backend module, these are newly added.
- int syscommon_plugin_deviced_battery_get_backend(void);
- int syscommon_plugin_deviced_battery_put_backend(void);
- int syscommon_plugin_deviced_battery_is_possible_to_notify_battery_full(bool *possible_notify);
    -> This is used to determine whether to inform the fully charged or not.

* libsyscommon.spec typo was also corrected.

Change-Id: I30a76504cd27ab44000459080fb7cd0f72f42c92
Signed-off-by: Yunhee Seo <yuni.seo@samsung.com>