use verified symbol instead of colored lock icons

src/main/java/eu/siacs/conversations/ui/adapter/MessageAdapter.java

@@ -211,33 +211,26 @@ public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextVie
 		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 			viewHolder.indicator.setVisibility(View.GONE);
 		} else {
-			viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_lock_white_18dp : R.drawable.ic_lock_black_18dp);
-			viewHolder.indicator.setVisibility(View.VISIBLE);
+			boolean verified = false;
 			if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
-				FingerprintStatus status = message.getConversation()
+				final FingerprintStatus status = message.getConversation()
 						.getAccount().getAxolotlService().getFingerprintTrust(
 								message.getFingerprint());
-
-				if(status == null || (type == SENT ? !status.isTrusted() : (!status.isVerified() && inValidSession))) {
-					viewHolder.indicator.setColorFilter(0xffc64545);
-					viewHolder.indicator.setAlpha(1.0f);
+				if (status != null && status.isVerified()) {
+					verified = true;
+				}
+			}
+			if (verified) {
+				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_verified_user_white_18dp : R.drawable.ic_verified_user_black_18dp);
 			} else {
-					viewHolder.indicator.clearColorFilter();
+				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_lock_white_18dp : R.drawable.ic_lock_black_18dp);
+			}
 			if (darkBackground) {
 				viewHolder.indicator.setAlpha(0.7f);
 			} else {
 				viewHolder.indicator.setAlpha(0.57f);
 			}
 		}
-			} else {
-				viewHolder.indicator.clearColorFilter();
-				if (darkBackground) {
-					viewHolder.indicator.setAlpha(0.7f);
-				} else {
-					viewHolder.indicator.setAlpha(0.57f);
-				}
-			}
-		}
 
 		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(),
 				message.getMergedTimeSent());