$ adb shell pm install -r --user 0 com.samsung.galaxy_gifts
pkg: com.samsung.galaxy_gifts
Failure [INSTALL_FAILED_INVALID_URI]
$ adb shell pm install -r --user 0 /system/app/com.samsung.galaxy_gifts__1.17_release/com.samsung.galaxy_gifts__1.17_release.apk
pkg: /system/app/com.samsung.galaxy_gifts__1.17_release/com.samsung.galaxy_gifts__1.17_release.apk
Success
$ adb shell pm list packages | grep com.samsung.galaxy_gifts
package:com.samsung.galaxy_gifts
$ adb shell pm uninstall --user 0 com.samsung.galaxy_gifts
Success
$ adb shell pm list packages | grep com.samsung.galaxy_gifts
package:com.samsung.galaxy_gifts
Text paste