[LYN-4915] [iOS] [Android] awscoreconfiguration.setreg, awsMetricsClientConfiguration.setreg and authenticationProvider.setreg couldn't be loaded when the application starts
* Final update copyright headers to reference license files at the repo root
Signed-off-by: spham <spham@amazon.com>
* Fix copyright validator unit tests to support the stale O3DE header scenario
Signed-off-by: spham <spham@amazon.com>
* Fix resource mappings file names and client auth warnings and asserts conditions
* Add comments to explain reasoning for client auth role permissions
* Update comments based on feedback
* Fix AWSClientAuth unit test