camera/QCamera2: HAL: Send Inactive AF state in landscape/sunset mode

Issue:
When scene mode is Landscape/Sunset, Backend AF mode is
set to Infinity and AF state is INACTIVE and then when
APP calls do AF, focus state is still Inactive and since
there is no change in AF state, HAL not sending the state
to frameworks and APP got stuck.

Fix:
Check backend AF mode is INFINITY and if its Active AF call
then send the corresponding AF INACTIVE state to frameworks.

Change-Id: I4663e29ecd3be8f257cfd18dd037c9208fb019ee

camera/QCamera2/HAL/QCamera2HWI.cpp

@@ -4043,6 +4043,13 @@ int32_t QCamera2HardwareInterface::processAutoFocusEvent(cam_auto_focus_data_t &
             break;
         }
 
+        // If the HAL focus mode is different from AF INFINITY focus mode, send event to app
+        if ((focus_data.focus_mode == CAM_FOCUS_MODE_INFINITY) &&
+                (focus_data.focus_state == CAM_AF_INACTIVE)) {
+            ret = sendEvtNotify(CAMERA_MSG_FOCUS, true, 0);
+            break;
+        }
+
         if (focus_data.focus_state == CAM_AF_PASSIVE_SCANNING ||
             focus_data.focus_state == CAM_AF_PASSIVE_FOCUSED ||
             focus_data.focus_state == CAM_AF_PASSIVE_UNFOCUSED) {
@@ -4081,6 +4088,14 @@ int32_t QCamera2HardwareInterface::processAutoFocusEvent(cam_auto_focus_data_t &
         break;
     case CAM_FOCUS_MODE_CONTINOUS_VIDEO:
     case CAM_FOCUS_MODE_CONTINOUS_PICTURE:
+
+        // If the HAL focus mode is different from AF INFINITY focus mode, send event to app
+        if ((focus_data.focus_mode == CAM_FOCUS_MODE_INFINITY) &&
+                (focus_data.focus_state == CAM_AF_INACTIVE)) {
+            ret = sendEvtNotify(CAMERA_MSG_FOCUS, false, 0);
+            break;
+        }
+
         if (mActiveAF &&
             (focus_data.focus_state == CAM_AF_PASSIVE_FOCUSED ||
             focus_data.focus_state == CAM_AF_PASSIVE_UNFOCUSED)) {

camera/QCamera2/stack/common/cam_types.h

@@ -851,6 +851,7 @@ typedef struct {
     cam_focus_distances_info_t focus_dist;       /* focus distance */
     int32_t focus_pos;
     uint32_t focused_frame_idx;
+    cam_focus_mode_type focus_mode;        /* focus mode from backend */
 } cam_auto_focus_data_t;
 
 typedef struct {