Update Gradle to v7.6.1

All Gradle wrapper files were updated as per instructions from Android Gradle Plugin's release notes (with one exception explained below):

gradlew wrapper --gradle-version 7.6.1 --distribution-type bin --gradle-distribution-sha256-sum 6147605a23b4eff6c334927a86ff3508cb5d6722cd624c97ded4c2e8640f1f87

--gradle-distribution-sha256-sum switch ads additional verification of downloaded Gradle distribution (as explained at https://docs.gradle.org/current/userguide/gradle_wrapper.html#sec:verification) for security reasons.

Version 7.6.1 is the latest from v7.x.x series, which is supported by the Android Gradle Plugin v7.4.2.
It contains various improvements and fixes documented at https://docs.gradle.org/7.6.1/release-notes.html.

Keeping up to date with the latest versions is good practice for various reasons, including (but not limited to) potential security fixes.

Signed-off-by: Patryk Mis <foss@patrykmis.com>

gradle/wrapper/gradle-wrapper.properties

@@ -17,9 +17,10 @@
 #
 #
 
-#Fri Oct 16 03:09:47 IST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionSha256Sum=6147605a23b4eff6c334927a86ff3508cb5d6722cd624c97ded4c2e8640f1f87
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip