Use latest available appCompat version

The current CLI logic finds appCompat version that matches the selected SDK version. However, the latest appCompat version is 26.0.0-alpha, so in case we have Android SDK 27, we are unable to find matchin appCompat.
In order to resolve the issue and allow using Android SDK 27, get latest available appCompat version when there's no matching one.

lib/android-tools-info.ts

@@ -306,6 +306,10 @@ export class AndroidToolsInfo implements IAndroidToolsInfo {
 		if (this.androidHome && requiredAppCompatRange) {
 			const pathToAppCompat = path.join(this.androidHome, "extras", "android", "m2repository", "com", "android", "support", "appcompat-v7");
 			selectedAppCompatVersion = this.getMatchingDir(pathToAppCompat, requiredAppCompatRange);
+			if (!selectedAppCompatVersion) {
+				// get latest matching version, as there's no available appcompat versions for latest SDK versions.
+				selectedAppCompatVersion = this.getMatchingDir(pathToAppCompat, "*");
+			}
 		}
 
 		this.$logger.trace(`Selected AppCompat version is: ${selectedAppCompatVersion}`);