Revert "Use injectable hardware video decoder/encoder in AppRTCMobile."

This reverts commit 0cbaf1a6f6ad13a25993f6ea3be931894a196834.

Reason for revert: Makes a test flaky:
https://build.chromium.org/p/client.webrtc/builders/Android32%20%28M%20Nexus5X%29/builds/4603

Original change's description:
> Use injectable hardware video decoder/encoder in AppRTCMobile.
> 
> Also include a small fix for getting the encoder queue.
> 
> Bug: webrtc:7760
> Change-Id: I96dc8ffb363b90382276d88148f81d5f89dca5f2
> Reviewed-on: https://webrtc-review.googlesource.com/2683
> Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
> Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#20022}

TBR=magjed@webrtc.org,sakal@webrtc.org

Change-Id: I6cb9a10eadb0eff2b85d5028d684746dc69bccfb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:7760
Reviewed-on: https://webrtc-review.googlesource.com/4480
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20024}
diff --git a/sdk/android/src/jni/videoencoderwrapper.cc b/sdk/android/src/jni/videoencoderwrapper.cc
index 55ebeef..ceecda2 100644
--- a/sdk/android/src/jni/videoencoderwrapper.cc
+++ b/sdk/android/src/jni/videoencoderwrapper.cc
@@ -97,6 +97,8 @@
 
   implementation_name_ = GetImplementationName(jni);
 
+  encoder_queue_ = rtc::TaskQueue::Current();
+
   initialized_ = false;
   num_resets_ = 0;
 
@@ -114,7 +116,6 @@
   number_of_cores_ = number_of_cores;
   codec_settings_ = *codec_settings;
   num_resets_ = 0;
-  encoder_queue_ = rtc::TaskQueue::Current();
 
   return InitEncodeInternal(jni);
 }
@@ -166,7 +167,6 @@
   jobject ret = jni->CallObjectMethod(*encoder_, release_method_);
   frame_extra_infos_.clear();
   initialized_ = false;
-  encoder_queue_ = nullptr;
   return HandleReturnCode(jni, ret);
 }