Update Android Project Generation to support AGP 4.2.0, Cmake 3.20, and newer versions of NDK&SDK

- build.gradle format updates for newer Android Gradle Plugin
- Remove hard coded Android Gradle Plugin version 3.6.4 to be passed in from command args
- Set Android Gradle Plugin min version 4.2.0 in order to support Min CMake version 3.20
- Add ability to use the android sdk to install missing components if needed rather than doing it externally
- Removed argument to pass in the NDK folder to use the android, use the android-sdk instead. Can request specific NDK versions if possible
- Android Gradle Plugin has dependencies by version and is being managed
- More defaults based on tools on path, agp version made possible so they are no longer needed in the command args

scripts/build/Platform/Android/pipeline.json

@@ -1,7 +1,7 @@
 {
     "ENV": {
-        "GRADLE_HOME": "C:/Gradle/gradle-5.6.4",
-        "NODE_LABEL": "windows-047e5cdf",
+        "GRADLE_HOME": "C:/Gradle/gradle-7.0",
+        "NODE_LABEL": "windows-b3c8994f1",
         "LY_3RDPARTY_PATH": "C:/ly/3rdParty",
         "TIMEOUT": 30,
         "WORKSPACE": "D:/workspace",