[eas-cli] create keystore for Android emulator builds in init:onboarding

[szdziedzic]

Why

https://exponent-internal.slack.com/archives/C06EBFAVCEA/p1715397103308639

create keystore for Android emulator builds in init:onboarding

How

create keystore for Android emulator builds in init:onboarding

Test Plan

test manually

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 53.54%. Comparing base (e1ebcc0) to head (13671ef).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...ackages/eas-cli/src/commands/project/onboarding.ts	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2379      +/-   ##
==========================================
- Coverage   53.55%   53.54%   -0.01%     
==========================================
  Files         530      530              
  Lines       19513    19517       +4     
  Branches     4135     4139       +4     
==========================================
  Hits        10449    10449              
- Misses       8332     8336       +4     
  Partials      732      732              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[github-actions]

Size Change: +972 B (0%)

Total Size: 51.3 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	51.3 MB	+972 B (0%)

_{compressed-size-action}

[github-actions]

⏩ The changelog entry check has been skipped since the "no changelog" label is present.