[8_3_X] fix(android): default Ti.Ui.TextField.editable is true in #focus()

[sgtcoolguy]

JIRA: https://jira.appcelerator.org/browse/TIMOB-27694

Optional Description:
If the proxy doesn't have an explicit value set for editable, assume true by default

Test Case:

var win = Ti.UI.createWindow({
  title : "Focus Test",
  backgroundColor : 'red',
  layout : "vertical"
});
 
// Create a TextField.
var aTextField = Ti.UI.createTextField({
  height : 40,
  top : 30,
  left : 20,
  right : 20,
  backgroundColor : "gray",
  hintText : 'This is hint text',
  softKeyboardOnFocus : Ti.UI.Android.SOFT_KEYBOARD_DEFAULT_ON_FOCUS, // Android only
  keyboardType : Ti.UI.KEYBOARD_DEFAULT,
  returnKeyType : Ti.UI.RETURNKEY_DEFAULT,
  borderStyle : Ti.UI.INPUT_BORDERSTYLE_ROUNDED
});
 
// Listen for return events.
aTextField.addEventListener('return', function(e) {
  aTextField.blur();
  alert('Input was: ' + aTextField.value);
});
 
// Add to the parent view.
win.add(aTextField);
 
// Create a Button.
var test = Ti.UI.createButton({
  title : 'Focus Test',
  height : Ti.UI.SIZE,
  width : Ti.UI.SIZE,
  top : 50,
});
 
// Listen for click events.
test.addEventListener('click', function() {
  aTextField.focus();
  //alert('\'aButton\' was clicked!');
});
 
// Add to the parent view.
win.add(test);
 
win.open();

[build]

	Fails
🚫	Tests have failed, see below for more information.

	Messages
📖	💾 Here's the generated SDK zipfile.
📖	✊ The commits in this PR match our conventions! Feel free to Rebase and Merge this PR when ready.
📖	❌ 10 tests have failed There are 10 tests failing and 710 skipped out of 7321 total tests.

Tests:

Classname	Name	Time	Error
android.emulator.fs	#readFile() returns String when utf-8 encoding set via options object argument	2.045	Error: timeout of 2000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.fs	#readFile() returns String when utf-8 encoding set via second argument	2.189	Error: timeout of 2000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.fs	#readFile() returns Buffer when no encoding set	2.002	Error: timeout of 2000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.Layout	widthPrecedence	16.841	Error: timeout of 5000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.WebView	userAgent	40.859	Error: timeout of 30000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
ios.ipad.Titanium.Network.Socket.TCP	#connect(), #write(), #pump() async	0.051	Error: failed to receive success file:///Users/build/Library/Developer/CoreSimulator/Devices/F77CB658-56A6-4456-8790-32B676E15B36/data/Containers/Bundle/Application/5C2674E0-FE19-4BAE-9C0E-121768996566/mocha.app/ti.network.socket.tcp.test.js:168:17
ios.ipad.Titanium.Network.Socket.TCP	#connect() and receive data	0.109	Error: failed to receive success file:///Users/build/Library/Developer/CoreSimulator/Devices/F77CB658-56A6-4456-8790-32B676E15B36/data/Containers/Bundle/Application/5C2674E0-FE19-4BAE-9C0E-121768996566/mocha.app/ti.network.socket.tcp.test.js:96:17
ios.iphone.Titanium.Geolocation	#reverseGeocoder()	0.915	Error: expected 'United States of America' to equal 'USA' fail@file:///Users/build/Library/Developer/CoreSimulator/Devices/F106B90B-6592-4206-B9F1-EED8DEA7340B/data/Containers/Bundle/Application/EE86065F-EC7F-403B-B197-052E149D7213/mocha.app/node_modules/should/cjs/should.js:275:19 value@file:///Users/build/Library/Developer/CoreSimulator/Devices/F106B90B-6592-4206-B9F1-EED8DEA7340B/data/Containers/Bundle/Application/EE86065F-EC7F-403B-B197-052E149D7213/mocha.app/node_modules/should/cjs/should.js:356:13 file:///Users/build/Library/Developer/CoreSimulator/Devices/F106B90B-6592-4206-B9F1-EED8DEA7340B/data/Containers/Bundle/Application/EE86065F-EC7F-403B-B197-052E149D7213/mocha.app/ti.geolocation.test.js:287:38
ios.iphone.Titanium.Network.Socket.TCP	#connect(), #write(), #pump() async	0.025	Error: failed to receive success file:///Users/build/Library/Developer/CoreSimulator/Devices/F106B90B-6592-4206-B9F1-EED8DEA7340B/data/Containers/Bundle/Application/EE86065F-EC7F-403B-B197-052E149D7213/mocha.app/ti.network.socket.tcp.test.js:168:17
ios.iphone.Titanium.Network.Socket.TCP	#connect() and receive data	0.063	Error: failed to receive success file:///Users/build/Library/Developer/CoreSimulator/Devices/F106B90B-6592-4206-B9F1-EED8DEA7340B/data/Containers/Bundle/Application/EE86065F-EC7F-403B-B197-052E149D7213/mocha.app/ti.network.socket.tcp.test.js:96:17

Generated by 🚫 dangerJS against 03f746b

[garymathews]

CR: PASS

[lokeshchdhry]

FR Passed.

Keyboard pops up when focus() is used.

Studio Ver: 6.0.0.201911251516
SDK Ver: 8.3.1 local build
OS Ver: 10.14.5
Xcode Ver: Xcode 11.2.1
Appc NPM: 5.0.0-2
Appc CLI: 7.1.2
Daemon Ver: 1.1.3
Ti CLI Ver: 5.2.2
Alloy Ver: 1.14.4
Node Ver: 12.13.1
NPM Ver: 6.12.1
Java Ver: 11.0.1
Android Devices: ⇨ google Pixel (Android 10)
Emulator: Android 8.1