Upgrade from jsc-android 250230.2.1 to 294992.0.0 (next) for BigInt

- react-native-community/jsc-android-buildscripts#159 (comment)
- facebook/react-native#35504 (comment)
- vanilla RN 0.71.6 tested working: 1n+2n, BigInt(1)+BigInt(2)
- package.json>resolution not required (result: resolution field incompatible)
- org.webkit:android-jsc-intl:+ required (which we're already using)

294992.0.0 prevents need for e.g. `big-integer` shim, till RN 0.71.6 shipped
#6221

294992.0.0 prevents need for BE patches, till RN 0.71.6 upgrade shipped
e.g. #6305 cc @Cal-L

But (the catch) 294992.0.0 results in repo-specific dep build error,
possibly more deps to resolve, likely via patch(es):

> Configure project :react-native-reanimated
No AAR for react-native-reanimated found. Attempting to build from source.
Android gradle plugin: 4.2.2
Gradle: 6.9

Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.9/userguide/command_line_interface.html#sec:command_line_warnings
Error: Command failed: ./gradlew app:installProdDebug -PreactNativeDevServerPort=8081
OpenJDK 64-Bit Server VM warning: Ignoring option MaxPermSize; support was removed in 8.0
Warning: Mapping new ns http://schemas.android.com/repository/android/common/02 to old ns http://schemas.android.com/repository/android/common/01
Warning: Mapping new ns http://schemas.android.com/repository/android/generic/02 to old ns http://schemas.android.com/repository/android/generic/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/02 to old ns http://schemas.android.com/sdk/android/repo/addon2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/03 to old ns http://schemas.android.com/sdk/android/repo/addon2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/02 to old ns http://schemas.android.com/sdk/android/repo/repository2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/03 to old ns http://schemas.android.com/sdk/android/repo/repository2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/03 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/02 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/leo/Documents/GitHub/metamask-mobile/node_modules/react-native-reanimated/android/build.gradle' line: 1059

* What went wrong:
A problem occurred evaluating project ':react-native-reanimated'.
> Expected directory '/Users/leo/Documents/GitHub/metamask-mobile/node_modules/react-native/../jsc-android/dist/org/webkit/android-jsc' to contain exactly one file, however, it contains no files.

package.json

@@ -218,6 +218,7 @@
     "humanize-duration": "^3.27.2",
     "improved-yarn-audit": "^3.0.0",
     "is-url": "^1.2.4",
+    "jsc-android": "294992.0.0",
     "json-rpc-engine": "^6.1.0",
     "json-rpc-middleware-stream": "3.0.0",
     "lodash": "^4.17.21",

yarn.lock

@@ -16004,6 +16004,11 @@ jsbn@~0.1.0:
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
   integrity sha1-peZUwuWi3rXyAdls77yoDA7y9RM=
 
+[email protected]:
+  version "294992.0.0"
+  resolved "https://registry.yarnpkg.com/jsc-android/-/jsc-android-294992.0.0.tgz#e456c91216fb6911f0063f0a4547a99c889882e6"
+  integrity sha512-DyV6nx8GM8sspQ1eEj5Sc5xtZF2OUfxLi3Hjke7SX3Xnnjaok1QLeB31mJLWBW02N4QDKl3R1dJpkXsPEPrVhA==
+
 jsc-android@^250230.2.1:
   version "250230.2.1"
   resolved "https://registry.yarnpkg.com/jsc-android/-/jsc-android-250230.2.1.tgz#3790313a970586a03ab0ad47defbc84df54f1b83"