Update GhidraPreparer and GitHubUtils class.

Update Ghidra setup() to provide manual instructions in case setup fails.
Update GitHubUtils#getJson() to retry if connection resets.

Bug: 338152662
Test: Place ghidra.zip at /tmp/tradefed_ghidra/ghidra.zip/ghidra.zip and run a Ghidra based CTS

Change-Id: I59a444a1e29834a41954c83c3cce1ec99b6984f7
2 files changed
tree: 0d43398acced3ff505e279315653bc63fa6ae469
  1. build/
  2. docs/
  3. emu_test/
  4. libraries/
  5. scripts/
  6. tests/
  7. utils/
  8. PREUPLOAD.cfg