libcamera2ndk_vendor: stop looper thread on ~ACameraDevice()

Bug: 135641415

Test: enroll; while(1) auth;

Change-Id: I59c522a0e8827c5990926f0cf7c7960e1cea2e5e
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>

camera/ndk/ndk_vendor/impl/ACameraDevice.cpp

@@ -44,6 +44,16 @@
 
 using namespace android;
 
+ACameraDevice::~ACameraDevice() {
+    Mutex::Autolock _l(mDevice->mDeviceLock);
+    if (mDevice->mCbLooper != nullptr) {
+      mDevice->mCbLooper->unregisterHandler(mDevice->mHandler->id());
+      mDevice->mCbLooper->stop();
+    }
+    mDevice->mCbLooper.clear();
+    mDevice->mHandler.clear();
+}
+
 namespace android {
 namespace acam {
 

camera/ndk/ndk_vendor/impl/ACameraDevice.h

@@ -135,6 +135,7 @@ class CameraDevice final : public RefBase {
 
   private:
     friend ACameraCaptureSession;
+    friend ACameraDevice;
 
     camera_status_t checkCameraClosedOrErrorLocked() const;
 
@@ -383,8 +384,7 @@ struct ACameraDevice {
                   sp<ACameraMetadata> chars) :
             mDevice(new android::acam::CameraDevice(id, cb, std::move(chars), this)) {}
 
-    ~ACameraDevice() {};
-
+    ~ACameraDevice();
     /*******************
      * NDK public APIs *
      *******************/