[PVR] API: Add menu visibility controls for timers

Add flags which can be used to prevent timer types:
1) needing an EPG Tag from appearing in 'Add...' menu
2) not related to EPG Tags appearing in 'Add Custom Timer' list

xbmc/addons/include/xbmc_pvr_types.h

@@ -130,6 +130,8 @@ extern "C" {
   const unsigned int PVR_TIMER_TYPE_SUPPORTS_START_ANYTIME            = 0x00040000; /*!< @brief enables an 'Any Time' over-ride option for startTime (using PVR_TIMER.bStartAnyTime) */
   const unsigned int PVR_TIMER_TYPE_SUPPORTS_END_ANYTIME              = 0x00080000; /*!< @brief enables a separate 'Any Time' over-ride for endTime (using PVR_TIMER.bEndAnyTime) */
   const unsigned int PVR_TIMER_TYPE_SUPPORTS_MAX_RECORDINGS           = 0x00100000; /*!< @brief this type supports specifying a maximum recordings setting' (PVR_TIMER.iMaxRecordings) */
+  const unsigned int PVR_TIMER_TYPE_REQUIRES_EPG_TAG_ON_CREATE        = 0x00200000; /*!< @brief this type shold not appear on any create menus which don't provide an associated EPG tag */
+  const unsigned int PVR_TIMER_TYPE_FORBIDS_EPG_TAG_ON_CREATE         = 0x00400000; /*!< @brief this type should not appear on any create menus which provide an associated EPG tag */
 
   /*!
    * @brief PVR timer weekdays (PVR_TIMER.iWeekdays values)