This could happen if you have two entries like in your AndroidManifest.xml. If you choose File -> New -> Activity -> Blank Activity this gets included in manifest file automatically. If you are not building for wearable you can delete this from manifest file or add missing library in build.gradle (app)
<uses-library
android:name="com.google.android.wearable"
android:required="true" />
<!--
Set to true if your app is Standalone, that is, it does not require the handheld
app to run.
-->
<meta-data
android:name="com.google.android.wearable.standalone"
android:value="true" />
This could also happen when your app expecting a library which is not installed yet. Please update your build.gradle for any missing library.