[android-developers] build-in Music App reinstall

I know this topic has been around alot but my main question is. Im not
trying to delete the built-in music App but I wanted to try and like
reinstall the Exact same app. I found the source code online and
figured i wanted to update the phone and install it but apparently i
dont even touch it i get

Re-installation failed due to different application signatures.
You must perform a full uninstall of the application. WARNING: This
will remove the application data!
Please execute 'adb uninstall com.android.music' in a shell.
Launch canceled!

and after i run the adb uninstall com.android.music obviously this is
failure cuz everony posts u cant uninstall it but im hoping someone
knows how to update it like what if android had a higher version app
for music how do they update it ???

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