Yesterday, it was reported that their is a bug that is preventing paid Android Wear apps from being installed. Google has responded today with a workaround for developers.
Normally, developers would use the “wearApp” Gradle rule to package wearable apps, but if it’s a paid app, they will have to manually package their app by changing the APK location from the assets/ directory to the res/raw directory.
This is a temporary workaround and Google apologizes for this inconvenience. They will be updating the
“wearApp” Gradle rule in a future update to the Android SDK build tools so that it will happen automatically.
For further instructions, hit the source link below.
source: Android Developers