Please help me to solve this error
> Task :app

rocessDebugManifest FAILED
C:\Users\Saima\Desktop\Codes\gofer_android_v2.2.1\gofer_android_V2.2.1\app\src\main\AndroidManifest.xml:24:5-78 Warning:
Element uses-permission#android.permission.SYSTEM_ALERT_WINDOW at AndroidManifest.xml:24:5-78 duplicated with element declared at AndroidManifest.xml:16:5-78
[com.braintreepayments.api:braintree:3.17.4] C:\Users\Saima\.gradle\caches\transforms-2\files-2.1\3a639c6a468a806b3c6b12aa8feb409b\jetified-braintree-3.17.4\AndroidManifest.xml:17:9-45 Error:
Missing 'package' key attribute on element package at [com.braintreepayments.api:braintree:3.17.4] AndroidManifest.xml:17:9-45
[com.braintreepayments.api:braintree:3.17.4] C:\Users\Saima\.gradle\caches\transforms-2\files-2.1\3a639c6a468a806b3c6b12aa8feb409b\jetified-braintree-3.17.4\AndroidManifest.xml:18:9-64 Error:
Missing 'package' key attribute on element package at [com.braintreepayments.api:braintree:3.17.4] AndroidManifest.xml:18:9-64
[com.braintreepayments.api:braintree:3.17.4] C:\Users\Saima\.gradle\caches\transforms-2\files-2.1\3a639c6a468a806b3c6b12aa8feb409b\jetified-braintree-3.17.4\AndroidManifest.xml Error:
Validation failed, exiting
See
http://g.co/androidstudio/manifest-merger for more information about the manifest merger.
Execution failed for task ':app

rocessDebugManifest'.
> Manifest merger failed with multiple errors, see logs
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.