Fix log submission OOM, improve log scrolling.

We were getting a TransactionTooLargeException when giving an
EditText a very large (1.5MB+) text block. This has been resolved
by switching to a RecyclerView to show the text line-by-line. As a
side-effect, this improves scroll performance on lower-end devices.

Also, I added a button to jump to the bottom of the log because I
really wanted one :)

Fixes #8124

src/org/thoughtcrime/securesms/contactshare/ContactNameEditActivity.java

@@ -6,8 +6,6 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.v7.widget.Toolbar;
-import android.text.Editable;
-import android.text.TextWatcher;
 import android.widget.TextView;
 
 import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity;
@@ -104,53 +102,37 @@ public class ContactNameEditActivity extends PassphraseRequiredActionBarActivity
 
     givenName.addTextChangedListener(new SimpleTextWatcher() {
       @Override
-      void onTextChanged(String text) {
+      public void onTextChanged(String text) {
         viewModel.updateGivenName(text);
       }
     });
 
     familyName.addTextChangedListener(new SimpleTextWatcher() {
       @Override
-      void onTextChanged(String text) {
+      public void onTextChanged(String text) {
         viewModel.updateFamilyName(text);
       }
     });
 
     middleName.addTextChangedListener(new SimpleTextWatcher() {
       @Override
-      void onTextChanged(String text) {
+      public void onTextChanged(String text) {
         viewModel.updateMiddleName(text);
       }
     });
 
     prefix.addTextChangedListener(new SimpleTextWatcher() {
       @Override
-      void onTextChanged(String text) {
+      public void onTextChanged(String text) {
         viewModel.updatePrefix(text);
       }
     });
 
     suffix.addTextChangedListener(new SimpleTextWatcher() {
       @Override
-      void onTextChanged(String text) {
+      public void onTextChanged(String text) {
         viewModel.updateSuffix(text);
       }
     });
   }
-
-  private static abstract class SimpleTextWatcher implements TextWatcher {
-
-    @Override
-    public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
-
-    @Override
-    public void onTextChanged(CharSequence s, int start, int before, int count) {
-      onTextChanged(s.toString());
-    }
-
-    @Override
-    public void afterTextChanged(Editable s) { }
-
-    abstract void onTextChanged(String text);
-  }
 }

src/org/thoughtcrime/securesms/contactshare/SimpleTextWatcher.java

@@ -0,0 +1,20 @@
+package org.thoughtcrime.securesms.contactshare;
+
+import android.text.Editable;
+import android.text.TextWatcher;
+
+public abstract class SimpleTextWatcher implements TextWatcher {
+
+  @Override
+  public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
+
+  @Override
+  public void onTextChanged(CharSequence s, int start, int before, int count) {
+    onTextChanged(s.toString());
+  }
+
+  @Override
+  public void afterTextChanged(Editable s) { }
+
+  public abstract void onTextChanged(String text);
+}