android build: Upgrade Gradle to 7.3.3

Done to parallel the RN template app at facebook/react-native@cd4c6659d,
on the way to RN v0.68.

Upstream release notes indicate it's a handful of bug fixes:
  https://docs.gradle.org/7.3.3/release-notes.html
including some for the major vulnerability last year in Log4j.
(This release went out 2021-12-22.)

Author: gnprice

android/gradle/wrapper/gradle-wrapper.properties

@@ -6,6 +6,6 @@
 #  the wrapper is the one from the new Gradle too.)
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists