Fix compile errors with Material 1.13.0: replace removed colorPrimary/colorControlNormal attrs

[Copilot]

Material 1.13.0 removed colorPrimary and colorControlNormal from com.google.android.material.R.attr, causing compileAlphaReleaseKotlin to fail with unresolved reference errors.

Changes

• Replace com.google.android.material.R.attr.colorPrimary → android.R.attr.colorPrimary in MainDesign.kt, PopupListAdapter.kt, ProxyViewConfig.kt
• Replace com.google.android.material.R.attr.colorControlNormal → android.R.attr.colorControlNormal in PopupListAdapter.kt

// Before
context.resolveThemedColor(com.google.android.material.R.attr.colorPrimary)
context.resolveThemedColor(com.google.android.material.R.attr.colorControlNormal)

// After
context.resolveThemedColor(android.R.attr.colorPrimary)
context.resolveThemedColor(android.R.attr.colorControlNormal)

Both platform attributes are available since API 21; minSdk is 23.

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