Re-bump version codes for version 0.13 RC01 and test-only release

[BenHenning]

Explanation

This updates version codes for the 0.13 beta release of Oppia Android. #5389 was made without an actual release taking place, and we've since launched a test version of the app using release automation that used up version code 151. Thus, this brings version codes 2 releases past version code 151:

• The earlier version codes (-7 from the ones in this PR) will be used for the 0.13 release.
• The current version codes will be used for a tester-only version of the app to verify our QA tester installation process.

Essential Checklist

• The PR title and explanation each start with "Fix #bugnum: " (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
• Any changes to scripts/assets files have their rationale included in the PR explanation.
• The PR follows the style guide.
• The PR does not contain any unnecessary code changes from Android Studio (reference).
• The PR is made from a branch that's not called "develop" and is up-to-date with "develop".
• The PR is assigned to the appropriate reviewers (reference).

For UI-specific PRs only

N/A -- build infrastructure-only change.

[BenHenning]

Self-review version changes.

[BenHenning]

@seanlip PTAL for codeowners.

[adhiamboperes]

@BenHenning, Just checking. PR description says, -7 from the version codes in this PR, do you mean Math minus since it's not clear from the values? I may have misunderstood.

[BenHenning]

@BenHenning, Just checking. PR description says, -7 from the version codes in this PR, do you mean Math minus since it's not clear from the values? I may have misunderstood.

Apologies @adhiamboperes for the lack of clarity. What I meant was that since each release RC has 7 version codes associated with it (for each of the possible flavors of that release), this PR is bumping forward the version codes for two release candidates from version code 151 (since that's the newest version pushed to play console, and we need to push releases with larger version codes).

Does that help clarify?

[adhiamboperes]

LGTM thanks.

[adhiamboperes]

@BenHenning, Just checking. PR description says, -7 from the version codes in this PR, do you mean Math minus since it's not clear from the values? I may have misunderstood.

Apologies @adhiamboperes for the lack of clarity. What I meant was that since each release RC has 7 version codes associated with it (for each of the possible flavors of that release), this PR is bumping forward the version codes for two release candidates from version code 151 (since that's the newest version pushed to play console, and we need to push releases with larger version codes).

Does that help clarify?

Got it, Thanks. I thought that you meant the numeric dfference in previous vs current codes 😁

[BenHenning]

Thanks @adhiamboperes!

[BenHenning]

Merging since this doesn't actually need @seanlip's review, and @adhiamboperes reviewed it.