Increase keymaster min_heap by 8KiB

RSA4096 key imports sometimes fail under stress testing due to a
failure to allocate a large (~16.8KiB) buffer inside of BoringSSL.
Boring needs to allocate such a large buffer to perform operations in
constant time.

Bumping the min_heap by 8KiB allows the stress test to pass.

Test: CtsKeystoreTestCases
Test: ParallelCtsKeystoreTestCases (aosp/1795969)
Change-Id: I10032f3cd74f1c71c2dbe15ac796d56046a930cf
diff --git a/manifest.json b/manifest.json
index cac879f..1832c1d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,5 +1,5 @@
 {
     "uuid": "5f902ace-5e5c-4cd8-ae54-87b88c22ddaf",
-    "min_heap": 98304,
+    "min_heap": 106496,
     "min_stack": 32768
 }