QCamera3: Fix dual cam default setting

Change QCAMERA3_DUALCAM_LINK_IS_MAIN default value to 1 in templates
because not all apps override it.

Test: GCA
Bug: 37999210
Change-Id: I64ecf2fd23888c232ec149c6ca7b6729d041902a
diff --git a/msm8998/QCamera2/HAL3/QCamera3HWI.cpp b/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
index 965f730..e678976 100644
--- a/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
+++ b/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
@@ -11190,7 +11190,7 @@
     uint8_t sync_type = CAM_TYPE_STANDALONE;
     settings.update(QCAMERA3_DUALCAM_LINK_ENABLE, &sync_type, 1);
 
-    uint8_t is_main = 0; //this doesn't matter as app should overwrite
+    uint8_t is_main = 1;
     settings.update(QCAMERA3_DUALCAM_LINK_IS_MAIN, &is_main, 1);
 
     uint8_t related_camera_id = mCameraId;