DEP-86: fix padding issue on left and right of the button.

Author: cquemin

yoti-sdk/src/main/java/com/yoti/mobile/android/sdk/YotiSDKButton.java

@@ -66,9 +66,17 @@ public void init(AttributeSet attrs) {
             }
         }
 
+        setLeftRigthPadding();
         setOnClickListener(this);
     }
 
+    private void setLeftRigthPadding(){
+        int paddingDp = 8;
+        float density = getResources().getDisplayMetrics().density;
+        int paddingPixel = (int)(paddingDp * density);
+        setPadding(paddingPixel,0,paddingPixel,0);
+    }
+
     @Override
     public void setOnClickListener(@Nullable View.OnClickListener l) {
         super.setOnClickListener(this);