Add SGP.26 (GSMA test) certificate support

Ideally, LPA software like easyEUICC should not make contain a list of
hard-coded TLS server certificates, but accept any certificates signed
by the SubjectKeyIds reported by the eUICC in GetEuiccInfo1/2.

I described this in more detail at
PeterCxy/OpenEUICC#11

As a work-around, this commit adds the GSMA SGP.26 test root
certificate, so at least test certificates are accepted.

This workaround will permit the use of test-SM-DP+ like
smdpp.test.rsp.sysmocom.de with test-eUICCs like the sysmoEUICC1-C2T.

app-common/src/main/res/raw/gsma_sgp26.pem

@@ -0,0 +1,30 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

app-common/src/main/res/xml/network_security_config.xml

@@ -3,6 +3,7 @@
     <base-config>
         <trust-anchors>
             <certificates src="@raw/symantec_gsma_rspv2_root_ci1"/>
+            <certificates src="@raw/gsma_sgp26"/>
             <certificates src="system"/>
         </trust-anchors>
     </base-config>

app-unpriv/build.gradle.kts

@@ -20,7 +20,7 @@ android {
     compileSdk = 34
 
     defaultConfig {
-        applicationId = "im.angry.easyeuicc"
+        applicationId = "im.angry.easyeuicc_sgp26"
         minSdk = 28
         targetSdk = 34
     }

app-unpriv/src/main/res/values/strings.xml

@@ -1,5 +1,5 @@
 <resources>
-    <string name="app_name" translatable="false">EasyEUICC</string>
+    <string name="app_name" translatable="false">EasyEUICC SGP.26</string>
     <string name="compatibility_check">Compatibility Check</string>
 
     <!-- Compatibility Check Descriptions -->

app/build.gradle.kts

@@ -15,7 +15,7 @@ android {
     compileSdk = 34
 
     defaultConfig {
-        applicationId = "im.angry.openeuicc"
+        applicationId = "im.angry.openeuicc_sgp26"
         minSdk = 30
         targetSdk = 34