mobile: Fix the READMEs about running local Android test apps

[fredyw]

Risk Level: n/a Testing: n/a Docs Changes: n/a Release Notes: n/a Platform Specific Features: n/a

[repokitteh-read-only[bot]]

As a reminder, PRs marked as draft will not be automatically assigned reviewers, or be handled by maintainer-oncall triage.

Please mark your PR as ready when you want it to be reviewed!

:cat:

Caused by: https://github.com/envoyproxy/envoy/pull/34333 was opened by fredyw.

see: more, trace.

[fredyw]

/assign @abeyad

[fredyw]

/retest