core: Add support for overriding build.prop settings

Author: Koushik Dutta <koushd@gmail.com>
Date:   Sat Jun 26 22:53:55 2010 -0700

    core: Add support for overriding build.prop settings

    Change-Id: Ie4224d608b7bcb0c2087bd77bc954f8f5f9b6495

Author: LuK1337 <priv.luk@gmail.com>
Date:   Fri Sep 13 03:44:13 2019 +0200

    Make PRODUCT_BUILD_PROP_OVERRIDES bit more powerful

    * This lets devices override stuff like PRODUCT_DEVICE
      for every kind of prop.

    Change-Id: I2afdf0b466bb5a1286b65526bcea98077d1650c0

Change-Id: I665a0281e4f101ec9ac3c5805dccab77d98c0d0b