[flutter_tool] More gracefully handle Android sdkmanager failure

[zanderso]

Description

This PR detects a failure to run the Android sdkmanager tool, and throws a ToolExit with appropriate advice.

Related Issues

#36152

Tests

I added the following tests:

Tests added in android_workflow_test.dart

Breaking Change

Does your PR require Flutter developers to manually update their apps to accommodate your change?

• Yes, this is a breaking change (Please read [Handling breaking changes]). Replace this with a link to the e-mail where you asked for input on this proposed change.
• No, this is not a breaking change.

[codecov]

Codecov Report

Merging #37194 into master will increase coverage by 0.7%.
The diff coverage is 86.66%.

@@            Coverage Diff            @@
##           master   #37194     +/-   ##
=========================================
+ Coverage   54.55%   55.26%   +0.7%     
=========================================
  Files         193      193             
  Lines       17849    17855      +6     
=========================================
+ Hits         9738     9867    +129     
+ Misses       8111     7988    -123

Flag	Coverage Δ
#flutter_tool	55.26% <86.66%> (+0.7%)	⬆️

Impacted Files	Coverage Δ
...ages/flutter_tools/lib/src/base/user_messages.dart	49.52% <0%> (-0.48%)	⬇️
...lutter_tools/lib/src/android/android_workflow.dart	63.52% <89.65%> (-0.77%)	⬇️
packages/flutter_tools/lib/src/device.dart	47.59% <0%> (-9.64%)	⬇️
packages/flutter_tools/lib/src/cache.dart	41.83% <0%> (-0.77%)	⬇️
packages/flutter_tools/lib/src/version.dart	90.73% <0%> (+0.48%)	⬆️
packages/flutter_tools/lib/src/base/process.dart	80.46% <0%> (+0.78%)	⬆️
packages/flutter_tools/lib/src/build_info.dart	70.71% <0%> (+1.65%)	⬆️
packages/flutter_tools/lib/src/ios/mac.dart	27.83% <0%> (+4.81%)	⬆️
...ges/flutter_tools/lib/src/android/android_sdk.dart	77.9% <0%> (+30.71%)	⬆️
...ckages/flutter_tools/lib/src/commands/channel.dart	72.3% <0%> (+69.23%)	⬆️

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[jonahwilliams]

LGTM