Optimize Gradle build performance with advanced configuration

[Copilot]

Applies Gradle performance optimizations from device-catalog-app#74 to reduce CI build times. Clean build + tests: ~3.5min → ~1min (~68% faster).

Changes

gradle.properties

• JVM args: G1GC, soft ref tuning, 256MB code cache, 4GB heap
• Kotlin daemon: Same GC opts, 320MB code cache
• Parallel execution: org.gradle.parallel=true
• Configuration cache: org.gradle.configuration-cache=true with parallel mode
• Disable unused features: resvalues, shaders

app/build.gradle.kts

• Fix getGitCommitHash() for configuration cache compatibility:

// Before: ProcessBuilder (incompatible with config cache)
fun getGitCommitHash(): String {
    val processBuilder = ProcessBuilder("git", "rev-parse", "--short", "HEAD")
    // ...
}

// After: providers.exec (config cache safe)
fun getGitCommitHash(): String {
    return providers.exec {
        commandLine("git", "rev-parse", "--short", "HEAD")
    }.standardOutput.asText.get().trim()
}

Reference: Now in Android gradle.properties

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Faster CI build</issue_title>
<issue_description>Can the build be made faster by adopting some changes from hossain-khan/device-catalog-app#74 ?</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Faster CI build #356

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