Add abiFilters property in gradle building

Signed-off-by: Leo Ma <begeekmyfriend@gmail.com>

app/build.gradle

@@ -10,6 +10,9 @@ android {
         targetSdkVersion 22
         versionCode 1
         versionName "1.0"
+        ndk {
+            abiFilters "armeabi-v7a", "x86"
+        }
     }
     buildTypes {
         release {

library/build.gradle

@@ -11,7 +11,9 @@ android {
         versionName "2.3"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-
+        ndk {
+            abiFilters "armeabi-v7a", "x86"
+        }
     }
     buildTypes {
         release {

library/src/main/java/net/ossrs/yasea/SrsEncoder.java

@@ -473,11 +473,8 @@ public class SrsEncoder {
     private native void setEncoderGop(int gop);
     private native void setEncoderBitrate(int bitrate);
     private native void setEncoderPreset(String preset);
-    private native byte[] NV21ToI420(byte[] yuvFrame, int width, int height, boolean flip, int rotate);
-    private native byte[] NV21ToNV12(byte[] yuvFrame, int width, int height, boolean flip, int rotate);
     private native byte[] RGBAToI420(byte[] rgbaFrame, int width, int height, boolean flip, int rotate);
     private native byte[] RGBAToNV12(byte[] rgbaFrame, int width, int height, boolean flip, int rotate);
-    private native int NV21SoftEncode(byte[] yuvFrame, int width, int height, boolean flip, int rotate, long pts);
     private native int RGBASoftEncode(byte[] rgbaFrame, int width, int height, boolean flip, int rotate, long pts);
     private native boolean openSoftEncoder();
     private native void closeSoftEncoder();