75931 [flutter_tools] gradle cleanup 1 of 99999 (cla: yes, tool)

75937 [flutter_releases] Flutter Framework 1.26.0-17.6.pre Beta Cherrypicks (cla: yes, engine, f: material design, framework, tool)

75940 [flutter_tools] do not use context logger in gradle (cla: yes, tool, waiting for tree to go green)

75954 Remove “unnecessary” imports in test/general.shard (cla: yes, tool)

75981 [fuchsia] - update getting local host address logic (cla: yes, tool, waiting for tree to go green)

76019 Fix package CHANGELOG template (cla: yes, tool)

76020 [flutter_tools] Remove globals/mocks from GradleUtils (cla: yes, tool)