Android: Lowered min "targetSdkVersion" from 25 to 23.

[jquick-axway]

JIRA: https://jira.appcelerator.org/browse/TIMOB-25510

Summary:
The Android min "targetSdkVersion" was bumped up from 23 to 25 in Titanium 6.2.2, but developers need the ability to target API Level 23 (aka: Android 6.0) in order to work-around Android 7.0's breaking changes (not all of them have been resolved yet). This change brings back API Level 23 targeting support.

Test:

1. Add the below Android settings to your project's "tiapp.xml" file.
2. Build the app for Android.
3. Open the file: ./<YourProject>/build/android/AndroidManifest.xml
4. Verify that the XML <uses-sdk> element's targetSdkVersion is set to 23.

<?xml version="1.0" encoding="UTF-8"?>
<ti:app xmlns:ti="http://ti.appcelerator.org">
	<android xmlns:android="http://schemas.android.com/apk/res/android">
		<manifest>
			<uses-sdk android:minSdkVersion="16" android:targetSdkVersion="23"/>
		</manifest>
	</android>
</ti:app>

[garymathews]

CR: PASS

[lokeshchdhry]

FR Passed.

1. Build SDK has "android sdk": ">=23.x <=25.x".
2. The app built to android device shows : [INFO] : Targeting Android SDK API: 23.
3. The androidmanifest has android:targetSdkVersion="23".

Studio Ver: 4.10.0.201709271713
SDK Ver: 7.0.0 local build
OS Ver: 10.12.3
Xcode Ver: Xcode 8.3.3
Appc NPM: 4.2.10
Appc CLI: 6.3.0
Ti CLI Ver: 5.0.14
Alloy Ver: 1.10.7
Node Ver: 7.10.1
Java Ver: 1.8.0_101
Devices: ⇨ google Nexus 5 --- Android 6.0.1
⇨ google Nexus 6P --- Android 8.0.0