I only created a single device in the AVD manager but see 2 devices in the IDE.
I chose the bogus target device since it did not have a (x) on it. Here's the error I get when I try a manual install:
C:\Users\Public\Documents\Embarcadero\Studio\19.0\CatalogRepository\AndroidSDK-2433_19.0.26309.314\platform-tools>adb install "C:\Dev\Delphi\Delphi 10\Android Test\Android\Debug\AndroidTest\bin\AndroidTest.apk"
Failed to install C:\Dev\Delphi\Delphi 10\Android Test\Android\Debug\AndroidTest\bin\AndroidTest.apk: Failure [INSTALL_FAILED_NO_MATCHING_ABIS: Failed to extract native libraries, res=-113]