Add PLATFORM_DISPLAY_VERSION to version_defaults.mk that will propagate
to the ro.build.version.release_or_preview_display property and
be shown as the Android version for preview releases by Settings.
Bug: 221950960
Test: manual
Change-Id: I697cc59f77f92aa98a8a2573662797e6d3bd2042
It defines values for Build.VERSION.KNOWN_CODENAMES constant, and should
contain all codenames starting from Q, including current codename
for in development branches.
Bug: 211747008
Test: presubmit
Change-Id: If8995750e369ba39bfc7041580c21b2f96632a78
With version_defaults.mk containing only simple assignments, it can be
automatically converted to Starlark.
This is a cherrypick of ag/15768054
Bug: 198995713
Test: treehugger
Merged-In: I4798fb69c639e6d52d275a5b793fa0c8ba876202
Change-Id: I17fab2e46c085fc4c07ae13c5e8cfb439097c634