Call AIBinder_setRequestingSid from createBinder override function

AIBinder_setRequestingSid must be called first upon creation of a
binder object before AIBinder_getCallingSid is called. Call
AIBinder_setRequestingSid in the createBinder override function
for WVDrmFactory, WVDrmPlugin and WVCryptoPlugin classes.

Test: Play TV streaming
Test: adb shell dumpsys android.hardware.drm.IDrmFactory/widevine -a

Bug: 237613676
Change-Id: I9dde4715ba2003deb463bd75b23e1ebc2f22a764

libwvdrmengine/aidl_include/WVDrmFactory.h

@@ -49,6 +49,8 @@ class WVDrmFactory : public ::aidl::android::hardware::drm::BnDrmFactory {
  private:
   WVDRM_DISALLOW_COPY_AND_ASSIGN(WVDrmFactory);
 
+  ::ndk::SpAIBinder createBinder() override;
+
   static WVGenericCryptoInterface sOemCryptoInterface;
 
   static bool areSpoidsEnabled();