Bump gradle from 7.0.3 to 7.0.4 (#3163)

Summary:
Bumps gradle from 7.0.3 to 7.0.4.

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Pull Request resolved: https://github.com/facebook/flipper/pull/3163

Reviewed By: passy

Differential Revision: D33234015

Pulled By: aigoncharov

fbshipit-source-id: 2920220a77123a7b57b073e8d77f80b0760bebc5

build.gradle

@@ -11,7 +11,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.3'
+        classpath 'com.android.tools.build:gradle:7.0.4'
         classpath 'com.vanniktech:gradle-maven-publish-plugin:0.18.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$KOTLIN_VERSION"
         classpath "org.jetbrains.dokka:dokka-gradle-plugin:1.6.0"