First thing is that Android is not open source. It's open core. Second thing go make android phone without signing NDA with Google, try to convince factories to sell you parts so you can make a mobile phone and wait until they say they don't want to be removed from Google official list.
Oh those companies do different things now so they're cool ? What things they do ? Siemens Mobile renamed and owned by Chinese, Alcatel licensed to TCL - Chinese. You're bragging aboout China being bad, but look those companies do different things they're good, they were forced to sell their business to China so they're good now.
It's all good, it's great. Great because you can install your linux. Very soon only on old hardware because they won't sell you new one without spyware and drm inside but well you're good. You can install things, but you can't install them on Playstation, you can't install them on Nintendo, on your coffe maker, on your washing machine, on your owen, on your car or anywhere you want. You can install things only where they allow you to do it and you're happy with that. LOL