new flutter repo level analysis options (#5786)

This adds and enables a raft of new analysis options for the flutter repository, many of which are commented out until we clean up our code and/or address any linter false positives.

.analysis_options

@@ -38,12 +38,19 @@ linter:
     # === error rules ===
     - avoid_empty_else
     # - comment_references # blocked on https://github.com/dart-lang/dartdoc/issues/1153
+    # - cancel_subscriptions # https://github.com/flutter/flutter/issues/5788
+    # - close_sinks # https://github.com/flutter/flutter/issues/5789
     - control_flow_in_finally
+    - empty_statements
     - hash_and_equals
+    # - invariant_booleans # https://github.com/flutter/flutter/issues/5790
     # - iterable_contains_unrelated_type
+    - list_remove_unrelated_type
+    # - literal_only_boolean_expressions # https://github.com/flutter/flutter/issues/5791
     - test_types_in_equals
     - throw_in_finally
     - unrelated_type_equality_checks
+    - valid_regexps
 
     # === style rules ===
     - always_declare_return_types
@@ -62,6 +69,7 @@ linter:
     - library_prefixes
     - non_constant_identifier_names
     - one_member_abstracts
+    # - only_throw_errors # https://github.com/flutter/flutter/issues/5792
     # - overridden_fields
     - package_api_docs
     - package_prefixed_library_names
@@ -73,6 +81,7 @@ linter:
     - super_goes_last
     # - type_annotate_public_apis # subset of always_specify_types
     - type_init_formals
+    # - unawaited_futures # https://github.com/flutter/flutter/issues/5793
     - unnecessary_brace_in_string_interp
     - unnecessary_getters_setters
 

.analysis_options_flutter_analyze

@@ -39,12 +39,19 @@ linter:
     # === error rules ===
     - avoid_empty_else
     # - comment_references # blocked on https://github.com/dart-lang/dartdoc/issues/1153
+    # - cancel_subscriptions # https://github.com/flutter/flutter/issues/5788
+    # - close_sinks # https://github.com/flutter/flutter/issues/5789
     - control_flow_in_finally
+    - empty_statements
     - hash_and_equals
+    # - invariant_booleans # https://github.com/flutter/flutter/issues/5790
     # - iterable_contains_unrelated_type
+    - list_remove_unrelated_type
+    # - literal_only_boolean_expressions # https://github.com/flutter/flutter/issues/5791
     - test_types_in_equals
     - throw_in_finally
     - unrelated_type_equality_checks
+    - valid_regexps
 
     # === style rules ===
     - always_declare_return_types
@@ -63,6 +70,7 @@ linter:
     - library_prefixes
     - non_constant_identifier_names
     - one_member_abstracts
+    # - only_throw_errors # https://github.com/flutter/flutter/issues/5792
     # - overridden_fields
     - package_api_docs
     - package_prefixed_library_names
@@ -74,6 +82,7 @@ linter:
     - super_goes_last
     # - type_annotate_public_apis # subset of always_specify_types
     - type_init_formals
+    # - unawaited_futures # https://github.com/flutter/flutter/issues/5793
     - unnecessary_brace_in_string_interp
     - unnecessary_getters_setters