Refresh wallet transparent balance flow from `WalletSummary`

Previously we only showed balance updates for the default address; this
could potentially undercount transparent balance in some cases.

We also now use the total zero-conf transparent balance for both "total"
and "available", because we only allow transparent balance to be
shielded, and we use a zero-conf transaction to do so.

sdk-lib/src/main/java/cash/z/ecc/android/sdk/block/processor/CompactBlockProcessor.kt

@@ -715,15 +715,6 @@ class CompactBlockProcessor internal constructor(
         transactionStorage.invalidate()
     }
 
-    /**
-     * Calculate the latest Transparent balance, based on the blocks that have been scanned and transmit this
-     * information into the internal [transparentBalances] flow.
-     */
-    internal suspend fun checkTransparentBalance() {
-        Twig.debug { "Checking Transparent balance" }
-        transparentBalances.value = getUtxoCacheBalance(getTransparentAddress(backend, Account.DEFAULT))
-    }
-
     /**
      * Update the latest balances using the given wallet summary, and transmit this information
      * into the related internal flows. Note that the Orchard balance is not supported.
@@ -732,10 +723,17 @@ class CompactBlockProcessor internal constructor(
         summary.accountBalances[Account.DEFAULT]?.let {
             Twig.debug { "Updating Sapling balance" }
             saplingBalances.value = it.sapling
-            // TODO [#682]: refresh orchard balance
+            // TODO [#682]: Uncomment this once we have Orchard support.
             // TODO [#682]: https://github.com/zcash/zcash-android-wallet-sdk/issues/682
+            // orchardBalances.value = it.orchard
+            // We only allow stored transparent balance to be shielded, and we do so with
+            // a zero-conf transaction, so treat all unshielded balance as available.
+            transparentBalances.value =
+                WalletBalance(
+                    it.unshielded,
+                    it.unshielded
+                )
         }
-        checkTransparentBalance()
     }
 
     /**

sdk-lib/src/main/java/cash/z/ecc/android/sdk/internal/model/AccountBalance.kt

@@ -4,7 +4,9 @@ import cash.z.ecc.android.sdk.model.WalletBalance
 import cash.z.ecc.android.sdk.model.Zatoshi
 
 internal data class AccountBalance(
-    val sapling: WalletBalance
+    val sapling: WalletBalance,
+    val orchard: WalletBalance,
+    val unshielded: Zatoshi
 ) {
     companion object {
         fun new(jni: JniAccountBalance): AccountBalance {
@@ -13,7 +15,13 @@ internal data class AccountBalance(
                     WalletBalance(
                         Zatoshi(jni.saplingTotalBalance),
                         Zatoshi(jni.saplingVerifiedBalance)
-                    )
+                    ),
+                orchard =
+                    WalletBalance(
+                        Zatoshi(jni.orchardTotalBalance),
+                        Zatoshi(jni.orchardVerifiedBalance)
+                    ),
+                unshielded = Zatoshi(jni.unshieldedBalance)
             )
         }
     }