QCamera3: Close HDR+ client in video mode

Close HDR+ client in video mode so Easel can go in low power mode.

Test: GCA
Bug: 37238108
Change-Id: I133a4f0875f0b537ded5a2d063e55f2f10ab2dab
diff --git a/msm8998/QCamera2/HAL3/QCamera3HWI.cpp b/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
index 4ec3c0a..1d9f365 100644
--- a/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
+++ b/msm8998/QCamera2/HAL3/QCamera3HWI.cpp
@@ -14447,6 +14447,10 @@
         if (res != OK) {
             ALOGE("%s: Failed to disable HDR+ mode: %s (%d)", __FUNCTION__, strerror(-res), res);
         }
+
+        // Close HDR+ client so Easel can enter low power mode.
+        gEaselManagerClient.closeHdrPlusClient(std::move(gHdrPlusClient));
+        gHdrPlusClient = nullptr;
     }
 
     mHdrPlusModeEnabled = false;