feat: add compact block filter client

Thanks to @thunderbiscuit for getting the work started initially.

Author: thunderbiscuit

.gitignore

@@ -10,6 +10,8 @@ local.properties
 *.log
 *.dylib
 *.so
+*.db
+*/data/signet
 .DS_Store
 testdb
 .lsp

bdk-android/lib/build.gradle.kts

@@ -56,6 +56,7 @@ dependencies {
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7")
     implementation("androidx.appcompat:appcompat:1.4.0")
     implementation("androidx.core:core-ktx:1.7.0")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.8.1")
     api("org.slf4j:slf4j-api:1.7.30")
 
     androidTestImplementation("com.github.tony19:logback-android:2.0.0")