Resolves Gradle deprecation and language version warnings
```gradle
Java compiler version 21 has deprecated support for compiling with source/target version 8.
```
The `java.toolchain.languageVersion` syntax is a superset that covers the previous syntax `android.compileOptions`
Refactor the publish action for Android to ensure that symbols are
published to Sentry for any 'release' buildLevel -- test releases and
alpha/beta/stable releases.
Splits the publish action into `publish-symbols` and
`publish-play-store` so that they can be run separately as needed, as
symbols can be published for test builds, but play store is only touched
for actual releases.
Note: examining the build logs and Sentry server state, it looks like
the publish to Sentry has not been happening for quite a while, so this
commit refactors the Sentry publishing code and establishes the
fv-keyboards publish target also.
Fixes: #14284
Build-bot: release
Test-bot: skip
Removes a number of unused functions from the file, renames remaining
functions to match our builder script prefix patterns, removes unused
imports from various build scripts (e.g. Android).
Fixes: #14453
Clarifies the confusing builder.inc.sh / build-utils.sh distinction by
giving the scripts more appropriate names. Most build scripts should use
builder-full.inc.sh; some helper scripts can use builder-basic.inc.sh.
Documented in resources/build/README.md.
Renames:
* resources/build/builder.inc.sh to resources/build/builder-full.inc.sh
* resources/build/build-utils.sh to resources/build/builder-basic.inc.sh
Other changes:
* Moves Android-specific functions out of builder-basic.inc.sh and into
android/build.sh.
* Renames functions in builder-basic.inc.sh
More functions may be moved from builder-basic.inc.sh into utils.inc.sh
or other scripts in the future.
Fixes: #14065
Build-bot: build all
Test-bot: skip
Adds documentation for various functions, removes unused functions (a
couple of simple, very lightly used functions were unDRYed; these could
go back the other way across all shell scripts if necessary). TODO items
noted for follow-up refactoring.
Fixes: #14275
Relates-to: #14269
Build-bot: build all
Test-bot: skip
Using Android Studio's tool to convert the top level RelativeLayout to ConstraintLayout. This way, the edge-to-edge doesn't cover up the top and bottom portions of the app.
Also apply insets so app and keyboard fit in usable areas.
