RN-193 & RN-197 (#625)

* RN-193 Always show the create btn on android

* RN-197 Update channel header on channel creation

* missing android actions from never to always show the btn

app/actions/views/create_channel.js

@@ -1,7 +1,7 @@
 // Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
-import {handleSelectChannel} from './channel';
+import {handleSelectChannel, setChannelDisplayName} from './channel';
 import {createChannel} from 'mattermost-redux/actions/channels';
 import {getCurrentTeamId} from 'mattermost-redux/selectors/entities/teams';
 import {getCurrentUserId} from 'mattermost-redux/selectors/entities/users';
@@ -23,6 +23,7 @@ export function handleCreateChannel(displayName, purpose, header, type) {
 
         channel = await createChannel(channel, currentUserId)(dispatch, getState);
         if (channel && channel.id) {
+            dispatch(setChannelDisplayName(displayName));
             handleSelectChannel(channel.id)(dispatch, getState);
         }
     };

app/screens/account_notifications/account_notifications.js

@@ -39,7 +39,7 @@ class AccountNotifications extends PureComponent {
 
     saveButton = {
         id: 'save-notifications',
-        showAsAction: 'never'
+        showAsAction: 'always'
     };
 
     constructor(props) {

app/screens/channel_add_members/channel_add_members.js

@@ -47,7 +47,7 @@ class ChannelAddMembers extends PureComponent {
     addButton = {
         disabled: true,
         id: 'add-members',
-        showAsAction: 'never'
+        showAsAction: 'always'
     };
 
     constructor(props) {

app/screens/channel_members/channel_members.js

@@ -47,7 +47,7 @@ class ChannelMembers extends PureComponent {
     removeButton = {
         disabled: true,
         id: 'remove-members',
-        showAsAction: 'never'
+        showAsAction: 'always'
     };
 
     constructor(props) {

app/screens/create_channel/create_channel.js

@@ -50,7 +50,7 @@ class CreateChannel extends PureComponent {
     rightButton = {
         id: 'create-channel',
         disabled: true,
-        showAsAction: 'never'
+        showAsAction: 'always'
     };
 
     constructor(props) {

app/screens/more_channels/more_channels.js

@@ -46,7 +46,7 @@ class MoreChannels extends PureComponent {
 
     rightButton = {
         id: 'create-pub-channel',
-        showAsAction: 'never'
+        showAsAction: 'always'
     };
 
     constructor(props) {