Bump gradle from 7.0.3 to 7.0.4

Bumps gradle from 7.0.3 to 7.0.4.

---
updated-dependencies:
- dependency-name: com.android.tools.build:gradle
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle.kts

@@ -4,7 +4,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath("com.android.tools.build:gradle:7.0.3")
+        classpath("com.android.tools.build:gradle:7.0.4")
         classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.0")
     }
 }