provide source code for the following files on this path. for the file that needs my api, provide me a placeholder that i can then replace with my api. LocationTracker$/$

$$ app$/$

$$ src$/$

$$ main$/$

$$ AndroidManifest.xml

$$ java$/$com$/$example$/$locationtracker$/$

$$ MainActivity.kt

$$ res$/$

$$ layout$/$activity$\_$main.xml

$$ build.gradle

$$ build.gradle