fix: preserve hCaptcha logo when using vector drawable support

[e271828-]

Summary

This fixes a regression introduced by the PNG density-variant optimization in 1d4778969f6feba5d0f6ec9923ac0efbeb37c88a.

That change correctly enabled vectorDrawables.useSupportLibrary and replaced android:src with app:srcCompat to avoid generating density-specific PNG fallbacks. The problem is that HCaptchaDialogFragment still inflates hcaptcha_fragment.xml through the plain DialogFragment / android.app.Dialog path. With a framework ImageView, app:srcCompat is ignored, so the loading logo drawable is never set at runtime.

Fix

• Replace the layout tag with androidx.appcompat.widget.AppCompatImageView
• Keep app:srcCompat and vectorDrawables.useSupportLibrary = true
• Avoid broader changes to dialog construction, theming, or inflater setup

Using the explicit AppCompat widget is the narrowest and most compatible fix because it preserves the size reduction goal while making vector inflation work on the existing production path down to the module's supported API levels.

Test coverage

• Add a Robolectric regression test that inflates the layout through the same plain Dialog context used by the fragment
• Assert that the logo view is an AppCompatImageView
• Assert that the logo drawable is non-null after inflation

Verification

• ./gradlew :sdk:testDebugUnitTest --tests '*HCaptchaFragmentLayoutTest'
• ./gradlew :sdk:testDebugUnitTest
• Repository pre-commit hook completed successfully during commit creation

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Diffuse report:

OLD: sdk-main.aar
NEW: sdk-pr.aar

 AAR      │ old      │ new      │ diff      
──────────┼──────────┼──────────┼───────────
      jar │ 59.4 KiB │ 59.4 KiB │       0 B 
 manifest │    411 B │    411 B │       0 B 
      res │ 78.2 KiB │ 28.3 KiB │ -49.9 KiB 
    other │    1 KiB │    1 KiB │       0 B 
──────────┼──────────┼──────────┼───────────
    total │  139 KiB │ 89.1 KiB │ -49.9 KiB 

 JAR     │ old │ new │ diff      
─────────┼─────┼─────┼───────────
 classes │  38 │  38 │ 0 (+0 -0) 
 methods │ 569 │ 569 │ 0 (+0 -0) 
  fields │ 174 │ 174 │ 0 (+0 -0)

AAR

 size     │ diff      │ path                                           
──────────┼───────────┼────────────────────────────────────────────────
          │ -17.1 KiB │ - res/drawable-xxxhdpi-v4/ic_hcaptcha_logo.png 
          │ -12.4 KiB │ - res/drawable-xxhdpi-v4/ic_hcaptcha_logo.png  
          │    -8 KiB │ - res/drawable-xhdpi-v4/ic_hcaptcha_logo.png   
          │  -5.7 KiB │ - res/drawable-hdpi-v4/ic_hcaptcha_logo.png    
          │    -4 KiB │ - res/drawable-mdpi-v4/ic_hcaptcha_logo.png    
          │  -2.8 KiB │ - res/drawable-ldpi-v4/ic_hcaptcha_logo.png    
          │ -10.9 KiB │ - res/drawable-anydpi-v21/ic_hcaptcha_logo.xml 
 10.9 KiB │ +10.9 KiB │ + res/drawable/ic_hcaptcha_logo.xml            
          │       0 B │ - res/drawable-anydpi-v21/                     
          │       0 B │ - res/drawable-xxxhdpi-v4/                     
          │       0 B │ - res/drawable-xxhdpi-v4/                      
          │       0 B │ - res/drawable-xhdpi-v4/                       
          │       0 B │ - res/drawable-hdpi-v4/                        
          │       0 B │ - res/drawable-ldpi-v4/                        
          │       0 B │ - res/drawable-mdpi-v4/                        
      0 B │       0 B │ + res/drawable/                                
  1.6 KiB │     +93 B │ ∆ res/layout/hcaptcha_fragment.xml             
──────────┼───────────┼────────────────────────────────────────────────
 12.5 KiB │ -49.9 KiB │ (total)

[github-actions]

Benchmark report:

Test name	Time ms. (median)	Allocations (median)
com.hcaptcha.sdk.HCaptchaBenchmarkTest.EMULATOR_UNLOCKED_benchmarkInvisibleVerification	+1034.43	+774
com.hcaptcha.sdk.HCaptchaBenchmarkTest.EMULATOR_UNLOCKED_benchmarkInvisibleVerificationColdRun	+1117.37	+1007
com.hcaptcha.sdk.HCaptchaBenchmarkTest.EMULATOR_UNLOCKED_benchmarkInvisibleSetup	+20.65	+230
com.hcaptcha.sdk.HCaptchaDebugInfoTest.EMULATOR_UNLOCKED_benchmarkDebugInfo	-0.24	-5595
com.hcaptcha.sdk.HCaptchaDebugInfoTest.EMULATOR_UNLOCKED_benchmarkDebugSys	+85.96	+2