fixes the crash while building the APK

[daadu]

Resources of 25 compile SDK does not match with 28

FAILURE: Build failed with an exception.                                
                                                                        
* What went wrong:                                                      
Execution failed for task ':contact_picker:verifyReleaseResources'.     
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > Android resource linking failed                                    
     /home/harsh/.gradle/caches/transforms-2/files-2.1/79a43a903ecb6dc82204ee669e724ddc/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/fontStyle not found.
                                                                        
     /home/harsh/.gradle/caches/transforms-2/files-2.1/79a43a903ecb6dc82204ee669e724ddc/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/font not found.
                                                                        
     /home/harsh/.gradle/caches/transforms-2/files-2.1/79a43a903ecb6dc82204ee669e724ddc/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/fontWeight not found.
                                                                        
     /home/harsh/.gradle/caches/transforms-2/files-2.1/79a43a903ecb6dc82204ee669e724ddc/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/fontVariationSettings not found.
                                                                        
     /home/harsh/.gradle/caches/transforms-2/files-2.1/79a43a903ecb6dc82204ee669e724ddc/core-1.0.0/res/values/values.xml:57:5-88:25: AAPT: error: resource android:attr/ttcIndex not found.

[kechkibet]

Kindly approve this

[lucalves]

An equal PR is open at #10.