Add iconloader(minSdkVersion:26).

iconloaderlib was min 21 but that's incorrect, and the actual minimum SDK version is at least 26.

Bug: 188851870
Apex-Size-Increase: N/A
Previous-Platform-Support: N/A (Upgrading minimum SDK version)
Ignore-Aosp-First: We need this change in sc-dev
Test-Info: presubmit
Change-Id: I62b04b80a8e217f247868fb3acedb334af3b0282
Merged-In: I62b04b80a8e217f247868fb3acedb334af3b0282
diff --git a/build/allowed_deps.txt b/build/allowed_deps.txt
index a49a679..4567dee 100644
--- a/build/allowed_deps.txt
+++ b/build/allowed_deps.txt
@@ -212,6 +212,7 @@
 guava(minSdkVersion:current)
 gwp_asan_headers(minSdkVersion:S)
 iconloader(minSdkVersion:21)
+iconloader(minSdkVersion:26)
 ipmemorystore-aidl-interfaces-java(minSdkVersion:29)
 ipmemorystore-aidl-interfaces-V10-java(minSdkVersion:29)
 jacocoagent(minSdkVersion:9)