build(deps): bump agp from 8.3.2 to 8.4.0 in /manager (#1688)

Bumps `agp` from 8.3.2 to 8.4.0.
Updates `com.android.application` from 8.3.2 to 8.4.0

Updates `com.android.library` from 8.3.2 to 8.4.0


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manager/gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-agp = "8.3.2"
+agp = "8.4.0"
 kotlin = "1.9.23"
 ksp = "1.9.23-1.0.20"
 compose-compiler = "1.5.11"