7246 Update iOS unit test for the removal of hex string encoding of uint64 data (cla: yes)

7248 Update terminology to match that of the flutter tool (cla: yes)

7250 Extract function to collect licenses for component (cla: yes)

7254 Fix javadoc for Android-28 (cla: yes)

7256 Document native functions for compilation trace (cla: yes)

7257 Add a system message channel for controlling the Skia resource cache size (cla: yes)

7258 Remove unused GrContext in AndroidSurfaceGL (cla: yes)

7260 Re-run license tool on all source when it changes (cla: yes)

7261 Update usage of some Android APIs that are deprecated in API level 28 (cla: yes)